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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities:      
Net (loss) income $ (1,904) $ 570 $ (2,649)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:      
Depreciation 155 294 481
Share-based compensation 823 564 272
Decrease in allowance for doubtful accounts    (609)   
Revaluation of warrants presented at fair value    524 215
Amortization of discount on long-term loan    141 40
Increase (decrease) in severance pay, net 60 (46) (365)
Decrease (increase) in trade receivables 1,369 (2,632) 3,508
(Increase) decrease in other current assets (1,782) (1,101) 366
Increase in inventories (2,661) (1,063) (167)
(Decrease) increase in trade payables 2 1,634 (1,004)
Increase (decrease) in other payables and accrued expenses 476 (920) 937
Decrease of interest on long-term loan    37 27
Increase (decrease) in deferred revenue 112 109 (771)
Net cash (used in) provided by operating activities (3,350) (2,498) 890
Cash flows from investing activities:      
Purchase of property and equipment (103) (56) (27)
Net cash used in investing activities (103) (56) (27)
Cash flows from financing activities:      
Payments of long term loan    (1,333) (1,167)
Proceeds from issuance of ordinary shares and warrants, net of issuance expenses    5,361   
Exercise of warrants 623 353 65
Exercise of options 144 643  
Net cash provided by (used in) financing activities 767 5,024 (1,102)
Foreign currency translation adjustments on cash and cash equivalents (157)      
(Decrease) increase in cash and cash equivalents (2,843) 2,470 (239)
Cash and cash equivalents at beginning of year 5,744 3,274 3,513
Cash and cash equivalents at end of year 2,901 5,744 3,274
Non-cash investing activities:      
Purchase of property and equipment on credit 3 8   
Property and equipment transferred to be used as inventory    7 40
Inventory transferred to be used as property and equipment 20      
Cash paid for interest    $ 95 $ 258