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CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities    
Net income (loss) $ (409) $ 187
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Depreciation and amortization 212 224
Recovery of inventory obsolescence (2) (28)
Loss on disposal of property and equipment, net (1) 0
Stock-based compensation 50 32
Change in fair value of liabilities 34 17
Provision (benefit) for deferred taxes (349) 130
Change in assets and liabilities:    
Trade receivables 948 (349)
Prepaid expenses (167) (411)
Inventories (551) 165
Deposits and other assets (254) 4
Accounts payable 82 (364)
Accrued and other liabilities 154 (93)
Net cash used in operating activities (253) (486)
Cash flows from investing activities    
Purchases of property and equipment (131) (243)
Net cash used in investing activities (131) (243)
Cash flows from financing activities    
Proceeds from stock options exercised 18 0
Repayments of long-term bond debt (34) (32)
Net cash used in financing activities (16) (32)
Net change in cash and cash equivalents (400) (761)
Cash and cash equivalents, beginning of period 4,162 4,880
Cash and cash equivalents, end of period 3,762 4,119
Cash paid during the three months ended March 31, 2013 and 2012 for:    
Interest 55 58
Income taxes $ 0 $ 0