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Note 2 - Summary of Significant Accounting Policies (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Net Income (Loss) Attributable to Parent (in Dollars) | $ (5,709,000) | $ (6,055,000) | $ (8,517,000)
Retained Earnings (Accumulated Deficit) (in Dollars) | (80,624,000) | (74,915,000) |
Cash Equivalents, at Carrying Value (in Dollars) | 1,100,000 |  |
Restricted Cash and Cash Equivalents (in Dollars) | 252,000 | 19,000 | 128,000
Inventory Adjustments (in Dollars) | 217,000 | 236,000 | 295,000
Contract Receivable Retainage (in Dollars) | 634,000 | 474,000 |
Operating Loss Carryforwards (in Dollars) | 70,700,000 |  |
Cash Collateral for Borrowed Securities (in Dollars) | 1,000,000 | 1,000,000 |
Goodwill, Impairment Loss (in Dollars) | 672,000 |  |
Advertising Expense (in Dollars) | 289,000 | 273,000 | 206,000
Percentage [Member] |  |  |
Contract Receivable Retainage, Description | 10% |  |
Solutions Segment [Member] | Minimum [Member] |  |  |
Sales Contract Term | 3 months |  |
Solutions Segment [Member] | Maximum [Member] |  |  |
Sales Contract Term | 18 months |  |
Percentage [Member] |  |  |
Contract Receivable Retainage, Description | 5% |  |
Months [Member] |  |  |
Contract Receivable Retainage, Description | three |  |
Months [Member] |  |  |
Contract Receivable Retainage, Description | eighteen |  |
US Navy Supply Contract [Member] |  |  |
Revenues (in Dollars) | 23,100,000 |  |
Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 2 years |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |  |
Standard Product Warranty Description | one |  |
Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Finite-Lived Intangible Asset, Useful Life | 10 years |  |
Standard Product Warranty Description | five |  |
Accounts Receivable [Member] |  |  |
Concentration Risk, Customer | four | four |
Concentration Risk, Percentage | 75.00% | 44.00% |
Sales Revenue, Services, Net [Member] |  |  |
Concentration Risk, Customer | four | four | two
Concentration Risk, Percentage | 42.00% | 36.00% | 36.00%
Specific Materials Requirement [Member] |  |  |
Concentration Risk, Percentage | 100.00% |  |
Concentration Risk, Supplier | single |  |
Deposit with a European Bank [Member] |  |  |
Cash Equivalents, at Carrying Value (in Dollars) | $ 97,000 |  |

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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 13 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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