CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows from Operating Activities:
Net (loss)	$ (890)	$ (54)
Adjustments to reconcile net loss to net cash (used) provided by operating activities:
Depreciation and amortization	2	5
Deferred tax assets	(21)	18
Asset allowances and reserves	(86)	(46)
Changes in assets and liabilities:
Accounts receivable	(208)	1,388
Royalty receivable	(62)	1,067
Inventory	(3,578)	(1,777)
Prepaid purchases	605	(72)
Prepaid expenses and other current assets	913	(49)
Other assets		1
Accounts payable and other current liabilities	310	289
Due to affiliates		(512)
Deferred revenue		1,875
Income taxes payable	1	1
Net cash (used) provided by operating activities	(3,014)	2,134
Cash Flows From Investing Activities:
Net proceeds from sale of short term investments	24,998	10,001
Proceeds from restricted cash		500
Additions to property, plant and equipment	(4)	(3)
Net cash provided by investing activities	24,994	10,498
Cash Flows from Financing Activities:
Purchases of treasury stock	(26)
Net cash (used) by financing activities	(26)
Net increase in cash and cash equivalents	21,954	12,632
Cash and cash equivalents at beginning of period	27,471	30,096
Cash and cash equivalents at end of period	49,425	42,728
Cash paid for:
Interest	$ 3	2
Income taxes		$ 4