CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 3,282	$ 2,485
Marketable securities (Note 7)	7,687	10,837
Accounts receivable, net of allowances of $5 and $91	140	83
Accrued investment income	25	37
Inventories, net (Note 8)	202	276
Prepaid expenses and other current assets	296	417
Total current assets	11,632	14,135
Property, plant and equipment, net (Note 9)	1,028	1,013
Intangible asset, net of accumulated amortization of $414 and $362 (Note 4)	1,586	1,638
Other assets	175	175
Total assets	14,421	16,961
Current liabilities
Accounts payable	375	110
Accrued expenses (Note 10)	1,155	564
Accrued interest	53	0
Other current liabilities	28	45
Sales returns liability	242	205
Debt - current (Note 11)	2,575	2,320
Total current liabilities	4,428	3,244
Debt - non-current portion, net of discount of $167 and $193, and debt issuance costs of $83 and $97 (Note 11)	4,806	5,430
Accrued interest - non-current portion	433	387
Total liabilities	$ 9,667	$ 9,061
Commitments and contingencies (Note 17)
Stockholders’ equity
Common stock - $.01 par value per share; 100,000 shares authorized, 11,834 and 11,801 shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively	$ 118	$ 118
Additional paid-in capital	375,325	375,157
Accumulated deficit	(370,694)	(367,310)
Accumulated other comprehensive income (loss)	5	(65)
Total stockholders’ equity	4,754	7,900
Total liabilities and stockholders’ equity	$ 14,421	$ 16,961