CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 3,928	$ 3,303
Restricted cash	0	15
Accounts receivable, net	3,390	4,068
Inventories	2,817	4,128
Prepaid expenses and other current assets	617	465
Total current assets	10,752	11,979
Property and equipment, net	10,180	13,851
Patents and licensed technologies, net	6,272	7,247
Other intangible assets, net	7,140	7,980
Goodwill	8,803	8,928
Other assets	46	94
Total assets	43,193	50,079
Current liabilities:
Note payable	339	299
Current portion of long-term debt	1,714	0
Accounts payable	1,853	4,446
Other accrued liabilities	1,992	2,161
Deferred revenues	235	173
Total current liabilities	6,133	7,079
Long-term liabilities:
Long-term debt, net	9,752	9,851
Senior secured convertible debentures, net	12,028	9,839
Warranty liability	105	7,042
Deferred tax liability	359	119
Other liabilities	97	62
Total liabilities	28,474	33,992
Commitments and Contingencies
Stockholders' equity:
Preferred Stock, $.10 par value, 10,000,000 shares authorized; 6,000 and 6,505 shares issued and outstanding, respectively	1	1
Common Stock, $.001 par value, 150,000,000 shares authorized; 10,834,490 and 10,283,393 shares issued and outstanding, respectively	11	10
Additional paid-in capital	225,280	223,315
Accumulated deficit	(210,575)	(207,240)
Accumulated other comprehensive income	2	1
Total stockholders' equity	14,719	16,087
Total liabilities and stockholders' equity	$ 43,193	$ 50,079