XML 14 R4.htm IDEA: XBRL DOCUMENT v2.4.0.8
Condensed Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Net loss $ (41,240) $ (15,611)
Loss from discontinued operations   6
Depreciation and amortization 237 147
Stock-based compensation 8,333 3,773
Amortization of debt discount 396 262
Prepaid expenses and other current assets (202) (89)
Accounts payable 514 980
Accrued expenses 826 (352)
Net cash used in operating activities (31,136) (10,884)
Purchases of property and equipment (1,518) (546)
Net cash used in investing activities (1,518) (546)
Proceeds from sale of common stock, net of issuance costs   50,491
Proceeds from convertible note financing   3,000
Proceeds from warrant exercise 600  
Proceeds from stock option exercise 1,120  
Proceeds from the issuance of shares under the Employee Stock Purchase Plan 25 13
Net cash provided by financing activities 1,745 53,504
Net increase (decrease) in cash and cash equivalents (30,909) 42,074
Cash and cash equivalents, beginning of period 53,506 17,974
Cash and cash equivalents, end of period $ 22,597 $ 60,048