CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities:
Net (loss) income	$ (3,384)	$ 1,239
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation	34	30
Provision to reduce inventory to net realizable value	0	260
Provision for sales returns	37	153
Share-based compensation	150	151
Amortization of debt discount and deferred debt issue costs	40	48
Amortization of bond premium in marketable securities	19	41
Amortization of intangible asset	52	52
Loss on sales of marketable securities	24	0
Changes in assets and liabilities:
Accounts receivable	(57)	(11)
Accrued investment income	12	3
Inventories	74	(238)
Prepaid expenses and other current assets	121	159
Other current deferred assets	0	214
Accounts payable	265	(56)
Accrued expenses	591	428
Deferred revenue	0	(353)
Accrued interest - current and long term	99	51
Other current liabilities	1	(4)
Net cash (used in) provided by operating activities	(1,922)	2,167
Cash Flows from Investing Activities:
Proceeds from sale and maturities of marketable securities	3,177	925
Additions to property, plant and equipment	(49)	(46)
Net cash provided by investing activities	3,128	879
Cash Flows from Financing Activities:
Proceeds from distribution of restricted stock units	0	1
Principal payments on debt	(409)	0
Net cash (used in) provided by financing activities	(409)	1
Net increase in cash and cash equivalents	797	3,047
Cash and cash equivalents at beginning of year	2,485	774
Cash and cash equivalents at end of period	3,282	3,821
Cash paid during the year for:
Interest	$ 110	$ 209