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Note 1 - Summary of Operations and Significant Accounting Policies (Details) (USD $) | 12 Months Ended | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Large Defense Primary Contractor [Member] Sales Revenue, Goods, Net [Member] | Dec. 31, 2012 Large Defense Primary Contractor [Member] Sales Revenue, Goods, Net [Member] | Dec. 31, 2013 Customer A [Member] Accounts Receivable [Member] | Dec. 31, 2012 Customer A [Member] Accounts Receivable [Member] | Dec. 31, 2013 Customer B [Member] Accounts Receivable [Member] | Dec. 31, 2012 Customer B [Member] Accounts Receivable [Member] | Dec. 31, 2013 Stock Options, Warrants And Restricted Stock Awards [Member] | Dec. 31, 2012 Stock Options, Warrants And Restricted Stock Awards [Member] | Dec. 31, 2013 Buildings [Member] Minimum [Member] | Dec. 31, 2013 Buildings [Member] Maximum [Member] | Dec. 31, 2013 Machinery and Equipment [Member] Minimum [Member] | Dec. 31, 2013 Machinery and Equipment [Member] Maximum [Member] | Dec. 31, 2013 Furniture and Fixtures [Member] Minimum [Member] | Dec. 31, 2013 Furniture and Fixtures [Member] Maximum [Member] | Dec. 31, 2013 Computer Hardware And Software [Member] Minimum [Member] | Dec. 31, 2013 Computer Hardware And Software [Member] Maximum [Member] | Jun. 30, 2013 Research and Development Expense [Member] | Dec. 31, 2013 Sales Revenue, Goods, Net [Member] | Dec. 31, 2013 Accounts Receivable [Member]
Note 1 - Summary of Operations and Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  |  |  | 10 years | 20 years | 5 years | 10 years | 3 years | 10 years | 3 years | 5 years |  |  |
Impairment of Long-Lived Assets Held-for-use | $ 0 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and Intangible Asset Impairment | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | 309,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Two | 229,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Three | 167,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Four | 122,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Year Five | 86,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Transaction Gain (Loss), Realized | (15,000) | (43,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advertising Expense | 413,000 | 538,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries of Construction Costs | 0 | 91,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries of Project Research and Development Costs | 0 | 11,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56,000 |  |
Asset Impairment Charges | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Major Customers |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 | 2
Concentration Risk, Percentage |  |  | 25.00% | 21.00% | 26.00% | 22.00% | 15.00% | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) |  |  |  |  |  |  |  |  | 2,251,622 | 2,211,488 |  |  |  |  |  |  |  |  |  |  |
Number of Operating Segments | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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