CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities:
Net loss	$ (12,309,000)	$ (10,753,000)
Adjustments to reconcile net loss to net cash used operating activities:
Depreciation and amortization of property and equipment	843,000	814,000
Amortization of intangible assets	747,000	404,000
Changes in fair value of warrant and earnout liabilities	(105,000)
Amortization of patents	12,000	0
Amortization and write-off of senior debt fees	280,000	436,000
Gain on sale of equipment	(416,000)	(408,000)
Provision for bad debts		(49,000)
Share-based compensation expense	234,000	77,000
Interest accrued on note payable	198,000	305,000
Change in deferred rent	(17,000)	58,000
Changes in operating assets and liabilities:
Accounts receivable	(1,729,000)	(53,000)
Inventories	328,000	134,000
Other current assets	29,000	(79,000)
Other assets	(124,000)	(80,000)
Accounts payable	(211,000)	5,000
Accrued expenses	(556,000)	182,000
Net cash used in operating activities	(12,796,000)	(9,007,000)
Cash Flows From Investing Activities:
Net proceeds from sale (purchase) of short-term investments	3,000,000	(7,000,000)
Capital expenditures	(346,000)	(72,000)
Net cash provided by (used in) investing activities	2,654,000	(7,072,000)
Cash Flows from Financing Activities:
Proceeds from senior debt note	10,000,000	10,000,000
Proceeds from sale of equipment		795,000
Net proceeds from issuance of stock	13,801,000	9,905,000
Payments made on borrowings	(797,000)	(10,930,000)
Payments of initial public offering costs	(574,000)
Deferred financing costs		(398,000)
Net cash provided by financing activities	22,430,000	9,372,000
Increase (decrease) in cash and cash equivalents	12,288,000	(6,707,000)
Cash and Cash Equivalents:
Beginning	13,343,000	11,947,000
Ending	25,631,000	5,240,000
Noncash Investing and Financing Activities
Initial public offering costs included in account payable and accrued expenses	558,000
Issuance of stock warrants	2,131,000
Preferred Stock Dividend	1,083,000	1,083,000
Supplemental Cash Flow Information:
Interest paid	$ 1,106,000	$ 907,000