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Note 1 - Summary of Operations and Significant Accounting Policies (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months (in Dollars) | $ 401 |
Finite-Lived Intangible Assets, Amortization Expense, Year Two (in Dollars) | 308 |
Finite-Lived Intangible Assets, Amortization Expense, Year Three (in Dollars) | 229 |
Finite-Lived Intangible Assets, Amortization Expense, Year Four (in Dollars) | 167 |
Finite-Lived Intangible Assets, Amortization Expense, Year Five (in Dollars) | 122 |
Foreign Currency Transaction Gain (Loss), Realized (in Dollars) | (43) | 95
Advertising Expense (in Dollars) | 538 | 792
Recoveries Of Construction Costs (in Dollars) | 91 | 254
Recoveries Of Project Research And Development Costs (in Dollars) | $ 11 | $ 56
Incremental Common Shares Attributable to Share-based Payment Arrangements (in Shares) |  | 252,218
Number of Operating Segments | 2 |
Customer C [Member] | Sales Revenue, Goods, Net [Member] |  |
Concentration Risk, Percentage | 21.00% | 21.00%
Customer A [Member] | Accounts Receivable [Member] |  |
Concentration Risk, Percentage | 22.00% |
Customer B [Member] | Accounts Receivable [Member] |  |
Concentration Risk, Percentage | 12.00% |
Stock Options, Warrants And Restricted Stock Awards [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | 2,211,488 | 2,105,228
Sales Revenue, Goods, Net [Member] |  |
Number Of Major Customers | 1 | 1
Accounts Receivable [Member] |  |
Number Of Major Customers | 2 |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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