Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Capital Stock, Stock Plans and Stock-based Compensation (Details Textual)

Note 4 - Capital Stock, Stock Plans and Stock-based Compensation (Details Textual) - USD ($)		3 Months Ended
	Jan. 13, 2017	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		6,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price		$ 3.79
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit		2.79
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit		$ 14.75
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		$ 83,000
Employee Service Share-based Compensation Nonvested Awards, Compensation Not yet Recognized, Stock Options, Remainder of Fiscal Year		37,000
Employee Service Share-based Compensation Nonvested Awards, Compensation Not yet Recognized, Stock Options, Year Two		33,000
Employee Service Share-based Compensation Nonvested Awards, Compensation Not yet Recognized, Stock Options, Year Three		13,000
Allocated Share-based Compensation Expense		23,000	$ 28,000
Employee Stock Option [Member]
Allocated Share-based Compensation Expense		$ 11,000	$ 13,000
The 2003 Outside Directors Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			0
Stock Issued During Period, Shares, Issued for Services		11,966
The 2003 Outside Directors Stock Plan [Member] \| Selling, General and Administrative Expenses [Member]
Allocated Share-based Compensation Expense		$ 53,000
The 2003 Outside Directors Stock Plan [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	6,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 3.79
The 2003 Outside Directors Stock Plan [Member] \| Director [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	180 days