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Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Cash flows from operating activities:    
Net loss $ (3,836) $ (2,141)
Net loss from discontinued operations 28 3
Adjustments to reconcile net loss to cash used in operating activities:    
Depreciation and amortization 274 334
Write-down of excess and obsolete inventory 16 137
Stock-based compensation expense 111 194
Loss (gain) on change in fair value of liability-classified warrants 2,051 (3)
Gain on foreign currency transactions (162) (277)
Other (6) 88
Changes in operating assets and liabilities:    
Accounts receivable (642) (1,107)
Inventories (206) (417)
Prepaid expenses and other assets (279) 171
Accounts payable 612 1,281
Income taxes 389 69
Accrued expenses and other current liabilities 62 (80)
Cash used in operating activities of continuing operations (1,588) (1,748)
Cash used in operating activities of discontinued operations (31) (2)
Net cash used in operating activities (1,619) (1,750)
Cash flows from investing activities:    
Purchases of property and equipment (78) (80)
Investment in unconsolidated affiliate    (66)
Net cash used in investing activities (78) (146)
Cash flows from financing activities:    
Net borrowings (payments) under demand line of credit 426 (334)
Proceeds from exercise of warrants 1,000   
Other (18) (2)
Net cash provided by (used in) financing activities 1,408 (336)
Effect of exchange rates on cash (23) (63)
Net change in cash (312) (2,295)
Cash at beginning of period 3,909 6,878
Cash at end of period $ 3,597 $ 4,583