CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 15,888	$ 4,069
Accounts receivable, net of allowance for doubtful accounts of $176 and $172, respectively	2,728	3,141
Inventories	2,488	3,009
Prepaid expenses and other current assets	670	533
Total current assets	21,774	10,752
Property and equipment, net	5,698	7,703
Intangible assets, net	9,867	11,325
Goodwill	8,803	8,803
Other assets	48	48
Total assets	46,190	38,631
Current liabilities:
Note payable	0	357
Current portion of long-term debt	0	2,387
Accounts payable	1,663	2,277
Other accrued liabilities	2,697	2,360
Warrant liability	104	0
Deferred revenues	327	291
Total current liabilities	4,791	7,672
Long-term liabilities:
Long-term debt, net	7,362	7,853
Deferred tax liability	392	414
Warrant liability	0	3
Other liabilities	268	444
Total liabilities	12,813	16,386
Commitments and contingencies (Note 16)
Stockholders' equity:
Common Stock, $.001 par value, 150,000,000 shares authorized; 29,943,086 and 4,304,425 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	30	4
Additional paid-in capital	266,854	251,643
Accumulated deficit	(233,508)	(229,406)
Total stockholders' equity	33,377	22,245
Total liabilities and stockholders' equity	46,190	38,631
Series C Convertible Preferred Stock [Member]
Stockholders' equity:
Series C Convertible Preferred Stock, $.10 par value, 10,000,000 shares authorized; 9,968 and 36,182 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	$ 1	$ 4