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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net loss $ (6,485) $ (4,510) $ (10,848)
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation 199 144 312
Capital loss    8 8
Impairment of property and equipment       11
Stock-based compensation to employees, directors and non-employees consultants 1,904 1,464 3,325
Stock compensation to investor relations consultants    78 155
Decrease (increase) in other accounts receivable (1,960) 317 656
Decrease (increase) in prepaid expenses 97 (15) (273)
Increase (decrease) in trade payables (1) 254 455
Increase in other accounts payable and accrued expenses 112 34 375
Increase in deferred revenues 4,615      
Increase in advanced payment 1,926      
Increase (Decrease) in interest receivable on short-term deposit (240) 15 15
Linkage differences and interest on short-term restricted lease deposit 22      
Linkage differences and interest on long-term restricted lease deposit 5 (3) (4)
Amortization of discount, premium and changes in accrued interest from marketable securities (33)      
Accrued severance pay, net 13 (5) 58
Net cash provided by operating activities 174 (2,219) (5,755)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchase of property and equipment (996) (560) (962)
Investment in short-term deposits (30,273)      
Proceeds from short-term deposits    898 898
Proceeds from sale of property and equipment    28 29
Investment in long-term deposits (1,011) (12) (14)
Repayment of long-term restricted deposit 2 13 13
Proceeds from sale of available for sale marketable securities 50      
Purchase of available for sale marketable securities (4,503)      
Net cash provided by (used in) investing activities (36,731) 367 (36)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Issuance of common stock and warrants, net of issuance costs    5,015 43,400
Exercise of warrants and options 400 17 3,661
Repayment of long-term loan    (24) (24)
Net cash provided by financing activities 400 5,008 47,037
Increase (decrease) in cash and cash equivalents (36,157) 3,156 41,246
Cash and cash equivalents at the beginning of the period 42,829 1,583 1,583
Cash and cash equivalents at the end of the period 6,672 4,739 42,829
(a) Supplemental disclosure of cash flow activities:      
Taxes paid due to non-deductible expenses 10 7 11
(b) Supplemental disclosure of non-cash activities:      
Increase (decrease) in fair value of marketable securities (134)      
Purchase of property and equipment in credit 121 73 123
Issuance of shares in consideration of accounts receivable    243   
Issuance of shares in consideration of leasehold improvements $ 1,245