Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stock Plans and Stock Based Compensation (Details Textual)

Note 4 - Stock Plans and Stock Based Compensation (Details Textual) - USD ($)				3 Months Ended		9 Months Ended
	Sep. 17, 2015	Sep. 17, 2015	Jul. 25, 2011	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Non-qualified Stock Options [Member] \| The 2003 Outside Directors Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		12,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		180 days
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 4.19
Employee Stock Option [Member] \| The 2010 Stock Option Plan [Member] \| Chief Operating Officer [Member] \| Contractual Term with One-third Yearly Vesting [Member]
Share-based Compensation Maximum Contractual Term			6 years
Employee Stock Option [Member] \| The 2010 Stock Option Plan [Member] \| Chief Operating Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Employee Stock Option [Member] \| The 2010 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				55,000		55,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number				18,333		18,333
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price				$ 5		$ 5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term						4 years 292 days
Employee Stock Option [Member]
Allocated Share-based Compensation Expense				$ 13,000	$ 12,000	$ 39,000	$ (27,000)
Director Stock Options [Member] \| The 2003 Outside Directors Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				163,200		163,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number				151,200		151,200
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price				$ 8.89		$ 8.89
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term						4 years 292 days
Director Stock Options [Member]
Allocated Share-based Compensation Expense				$ 2,000	$ 3,000	$ 23,000	$ 25,000
The 2003 Outside Directors Stock Plan [Member] \| Selling, General and Administrative Expenses [Member]
Allocated Share-based Compensation Expense						$ 216,000
The 2003 Outside Directors Stock Plan [Member]
Stock Issued During Period, Shares, Share-based Compensation, Gross						55,459
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						3,423
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures						3,423
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price						$ 2.79
The 2010 Stock Option Plan [Member] \| Chief Operating Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			60,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price			$ 7.85
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross						0	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price						$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				218,200	246,343	218,200	246,343	239,023	362,800
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number				212,333	237,543	212,333	237,543
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price				$ 7.65	$ 7.77	$ 7.65	$ 7.77	$ 7.81	$ 9.53
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term						5 years 36 days	5 years 36 days
Reduction in Stock-based Compensation Expense							$ 54,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized				$ 117,000		$ 117,000
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost not yet Recognized Remaining Fiscal Year				30,000		30,000
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost not yet Recognized Next Twelve Months				68,000		68,000
Employee Service Share-based Compensation Nonvested Awards, Total Compensation Cost not yet Recognized in Year Two				19,000		19,000
Allocated Share-based Compensation Expense				$ 15,000	$ 15,000	$ 62,000	$ (2,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						3,423	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price						$ 2.79	$ 0