Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014
Cash flows from operating activities:
Net loss	$ (5,530)		$ (1,933)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	36		29
Stock-based compensation	90		30
Fair value of warrants issued to employees for bonuses	244
Fair value of warrants issued to service providers	136
Revaluation of fair value of warrant liability			(43)
Non-cash interest expense	102		264
Changes in assets and liabilities:
Accounts receivable	6
Inventory	(226)		40
Prepaid expenses and other current assets	(898)		(15)
Other noncurrent assets	3		14
Accounts payable	196		237
Accrued liabilities	769		22
Net cash used in operating activities	(5,072)		(1,355)
Cash flows from investing activities:
Purchase of property and equipment	(1)		(106)
Net cash used in investing activities	(1)		(106)
Cash flows from financing activities:
Net cash proceeds from issuance of common stock in connection with private placement offering	11,040
Proceeds from note payable	1,500
Proceeds from related party convertible bridge notes			1,250
Net cash provided by financing activities	12,540		1,250
Net increase (decrease) in cash and cash equivalents	7,467		(211)
Cash and cash equivalents - beginning of period	895	[1]	430
Cash and cash equivalents - end of period	8,362		219
Supplemental disclosure:
Cash paid for interest	85		70
Cash paid for income taxes	1		$ 1
Supplemental disclosure of cash flow information as of end of period:
Transfer of equipment between inventory and property and equipment	20
Issuance of warrant in connection with note payable	$ 10

[1] The condensed consolidated balance sheet as of December 31, 2014 has been derived from the audited consolidated financial statements as of that date.