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Condensed Consolidated Statements of Cash Flows (unaudited) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash flows from operating activities:    
Net income $ 5,385 $ 4,039
Adjustments to reconcile net income to net cash used in operating activities:    
Depreciation and amortization 146 147
Stock-based compensation 182 164
Deferred income taxes 2,283  
Provision for doubtful accounts 128 421
Provision for inventory reserve, net (342) 77
Changes in operating assets and liabilities:    
Trade receivables (21,696) (15,808)
Inventories 3,178 (1,956)
Prepaid expenses   (92)
Other current assets 723 118
Accounts payable (4,551) 2,591
Accrued expenses and other current liabilities 4,600 2,388
Net cash used in operating activities (9,964) (7,911)
Cash flows from investing activities:    
Purchases of equipment (60) (116)
Purchases of intangible assets   (1,401)
Net cash used in investing activities (60) (1,517)
Cash flows from financing activities:    
Principal payments under capital lease obligation   (1)
Proceeds from exercise of stock options 8  
Net proceeds (repayments) from debt (1) 3,005
Net cash provided by financing activities 7 3,004
Effects of exchange rate changes 216 360
Net decrease in cash and cash equivalents (9,801) (6,064)
Cash and cash equivalents at beginning of period 18,216 6,724
Cash and cash equivalents at end of period 8,415 660
Supplemental disclosure of cash flow information    
Interest paid 7 15
Income taxes paid $ 81 $ 66