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Note 1 - Summary of Operations and Significant Accounting Policies (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Note 1 - Summary Of Operations And Significant Accounting Policies Details Narrative |  |
Impairments of long-lived assets | $ 0 | $ 0
Impairments of indefinite lived intangible assets | 150 | 0
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months |  | 166
Finite-Lived Intangible Assets, Amortization Expense, Year Two |  | 121
Finite-Lived Intangible Assets, Amortization Expense, Year Three |  | 85
Finite-Lived Intangible Assets, Amortization Expense, Year Four |  | 62
Finite-Lived Intangible Assets, Amortization Expense, Year Five |  | 49
Foreign Currency Transaction Gain (Loss), Realized | 48 | 235
Advertising Expense | 59 | 43
Total research and development spending | 6,112 | 5,648
Customer sponsored R&D included in cost of goods sold | 509 | 315
Revenue recognized relating to customer sponsored R&D | 509 | 317
Write-off of capitalized costs - NYSERDA project | $ 0 | $ 161
Significant customer disclosure - revenue from large defense contractor | 18.00% | 24.00%
Significant customers - trade accounts receivable - largest | 0.00% | 16.00%
Employee stock options excluded from calculation of diluted earnings per share | 945,687 | 2,195,222
Stock options included in calculation of diluted earnings per share | 1,312,282 | 0
Number of shares added to earnings per share calculation by stock option | 260,318 | 0
Restricted stock units included in calculation of diluted earnings per share | 32,800 | 0
Number of shares added to earnings per share calculation by restricted stock units | 15,385 | 0

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