Consolidated Statements of Cash Flows (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2012
Statement Of Cash Flows [Abstract]
Issuance of common stock to note holders			1,525,387
Convertible notes principal balance			$ 1,500
Accrued interest			25
Issued warrants with connection with reverse merger and private placement			32,743
Purchased equipment through capital lease			34
Transferred amount of inventory to fixed assets	272		391
Issued warrants to purchase shares of common stock for consulting services shares		75,000	650,000
Issued warrants to purchase shares of common stock for consulting services		404	890
Warrant liability reduced	23,869	10,874	23,321
Warrant reclassified as equity instruments	$ 1,886	$ 767