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Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Cash flows from operating activities:    
Net income (loss) $ (1,052) $ 1,741
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation expense 1,272 919
Depreciation 769 608
(Gain) loss on sales of fixed assets 11 (4)
Non cash restructuring charge (64) (118)
Amortization Of Catalog Costs 8 24
Provision for allowance for doubtful accounts 3 (30)
Amortization of intangible assets 1,471 1,221
Amortization of deferred financing costs 30 30
Deferrred Income Taxes (1,027) 119
Changes in operating assets and liabilities:    
(Increase) decrease in accounts receivable (2,136) (294)
Increase in inventories (1,242) (1,312)
Increase in other receivables and other assets (240) (864)
Increase in trade accounts payable 2,451 349
(Decrease) increase in accrued income taxes (395) (7)
Increase in accrued expenses (660) 51
(Decrease) increase in deferred revenue 216 (36)
Increase (decrease) in other liabilities (396) 89
Net cash provided by operating activities (981) 2,486
Cash flows (used in) provided by investing activities:    
Additions to property, plant and equipment (1,640) (744)
Proceeds from sales of property, plant and equipment 15 78
Acquisitions, net of cash acquired (4,545) 0
Net cash used in investing activities (6,170) (666)
Cash flows provided by (used in) financing activities:    
Repayments of debt (4,850) (2,500)
Net proceeds from issuance of debt 4,050 0
Payments of debt issuance costs (32) 0
Net proceeds from issuance of common stock 1,864 1,001
Net cash (used in) provided by financing activities 1,032 (1,499)
Effect of exchange rate changes on cash (613) 342
Increase in cash and cash equivalents (6,732) 663
Cash and cash equivalents at the begining of period 14,134 25,771
Cash and cash equivalents at the end of period 7,402 26,434
Supplemental disclosures of cash flow information [Abstract]    
Cash paid for interest 427 458
Cash paid for income taxes, net of refunds $ 312 $ 688