CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 14,445	$ 4,069
Accounts receivable, net of allowance for doubtful accounts of $122 and $172, respectively	2,574	3,141
Inventories	2,413	3,009
Prepaid expenses and other current assets	828	533
Total current assets	20,260	10,752
Property and equipment, net	6,271	7,703
Intangible assets, net	10,270	11,325
Goodwill	8,803	8,803
Other assets	48	48
Total assets	45,652	38,631
Current liabilities:
Note payable	51	357
Current portion of long-term debt	0	2,387
Accounts payable	1,477	2,277
Other accrued liabilities	2,330	2,360
Deferred revenues	393	291
Total current liabilities	4,251	7,672
Long-term liabilities:
Long-term debt, net	7,321	7,853
Deferred tax liability	493	414
Other liabilities	287	447
Total liabilities	12,352	16,386
Commitments and contingencies
Stockholders' equity:
Common Stock, $.001 par value, 150,000,000 shares authorized; 29,735,498 and 4,304,425 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	30	4
Common stock issuable	0	0
Additional paid-in capital	266,487	251,643
Accumulated deficit	(233,218)	(229,406)
Total stockholders' equity	33,300	22,245
Total liabilities and stockholders' equity	45,652	38,631
Series C Convertible Preferred Stock [Member]
Stockholders' equity:
Series C Convertible preferred Stock, $.10 par value, 10,000,000 shares authorized; 10,115 and 36,182 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	$ 1	$ 4