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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Operating activities:    
Net loss $ (9,681) $ (1,590)
Adjustments to reconcile net loss to net cash used in operating activities:    
Change in valuation of liabilities measured at fair value (20) (1,120)
Change in valuation of financial instruments associated with stock purchase agreement 111   
Depreciation 46 36
Gain on sale of patents    (5,500)
Stock-based compensation 370 146
Changes in operating assets and liabilities:    
Prepaid expenses and other assets 34 (1,124)
Accounts payable and other current liabilities 313 (1,530)
Net cash used in operating activities (8,827) (10,682)
Investing activities:    
Purchase of property, plant and equipment (65) (92)
Minimum royalty payments received from termination of ALIGN license agreement 192 264
Proceeds from sale of patents    5,500
Net cash provided by investing activities 127 5,672
Financing activities:    
Proceeds from issuance of common stock, net of issuance costs 10,965 22,495
Payment of preferred stock dividend (100) (192)
Net cash provided by financing activities 10,865 22,303
Effect of exchange rate changes on cash and cash equivalents 145 (37)
Net increase in cash and cash equivalents 2,310 17,256
Cash and cash equivalents, beginning of period 31,146 16,412
Cash and cash equivalents, end of period 33,456 33,668
Cash received during the period for:    
Interest 3 5
Taxes 1,811   
Schedule of non-cash transactions:    
Issuance of Ordinary shares in lieu of cash bonus    $ 181