Annual report pursuant to Section 13 and 15(d)

Note 2 - Summary of Significant Accounting Policies (Details Textual)

Note 2 - Summary of Significant Accounting Policies (Details Textual)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Percentage of Reserves for Doubtful Accounts Receivable			100.00%
Contract Receivable Retainage			$ 0	$ 229,000
Tangible Asset Impairment Charges			1,816,000
Depreciation			3,717,000	3,246,000
Research and Development Expense			2,046,000	$ 2,302,000
Decrease in Prepaid and Other Assets [Member] \| December 31, 2015 [Member]
Prior Period Reclassification Adjustment			(152,000)
Decrease in Current Portion of Long-term Debt [Member] \| December 31, 2015 [Member]
Prior Period Reclassification Adjustment			(27,000)
Decrease in Long-term Debt, Less Current Portion [Member] \| December 31, 2015 [Member]
Prior Period Reclassification Adjustment			$ (125,000)
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Number of Major Customers			2	1
Federal Government [Member]
Revenues			$ 27,354,000	$ 36,105,000
Federal Government [Member] \| Sales Revenue, Services, Net [Member] \| Customer Concentration Risk [Member]
Revenues			$ 27,354,000	$ 36,105,000
Concentration Risk, Percentage			53.40%	57.90%
PSC Metal, Inc. [Member] \| Sales Revenue, Services, Net [Member] \| Customer Concentration Risk [Member]
Revenues			$ 9,763,000
Concentration Risk, Percentage			19.10%
Number of Major Customers			1
Prologis Teterboro, LLC [Member] \| Sales Revenue, Services, Net [Member] \| Customer Concentration Risk [Member]
Revenues				$ 10,686,000
Concentration Risk, Percentage				17.10%
Number of Major Customers				1
Customer A [Member] \| Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage			10.10%	16.20%
Customer B [Member] \| Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Concentration Risk, Percentage			20.80%
Medical [Member]
Research and Development Expense			$ 1,489,000	$ 2,114,000
Treatment [Member]
Research and Development Expense			504,000	179,000
Goodwill, Impairment Loss			0	0
Treatment [Member] \| Federal Government [Member]
Revenues			$ 21,434,000	30,130,000
PCB Permit [Member]
Number of Definite-lived Permits			1
M&EC [Member]
Property, Plant and Equipment, Useful Life		1 year 219 days
Tangible Asset Impairment Charges	$ 1,816,000	$ 1,816,000
Minimum [Member] \| M&EC [Member]
Property, Plant and Equipment, Useful Life		2 years
Maximum [Member] \| M&EC [Member]
Property, Plant and Equipment, Useful Life		28 years
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life			10 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life			40 years
Furniture and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life			3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life			7 years
Workers Compensation [Member]
Escrow Deposit				$ 35,000