CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net (loss) income	$ (1,932)	$ 111
Adjustments to reconcile net loss to net cash (used) provided by operating activities:
Depreciation and amortization	4	7
Deferred tax assets	(24)	82
Asset allowances and reserves	(57)	(90)
Changes in assets and liabilities:
Accounts receivable	(513)	2,020
Royalty receivable	36	1,044
Inventory	(2,579)	(1,832)
Prepaid purchases	384	355
Prepaid expenses and other current assets	664	(244)
Accounts payable and other current liabilities	225	(573)
Due to affiliates		(512)
Deferred revenue		938
Income taxes payable	1	35
Net cash (used) provided by operating activities	(3,791)	1,341
Cash Flows From Investing Activities:
Net proceeds from sale of short term investments	1,903	7,091
Proceeds from restricted cash		500
Additions to property, plant and equipment	(4)	(3)
Net cash provided by investing activities	1,899	7,588
Cash Flows from Financing Activities:
Purchases of treasury stock	(3,652)
Net cash (used) by financing activities	(3,652)
Net (decrease) increase in cash and cash equivalents	(5,544)	8,929
Cash and cash equivalents at beginning of period	27,471	30,096
Cash and cash equivalents at end of period	21,927	39,025
Cash paid for:
Interest	5	2
Income taxes	$ 4	$ 8