CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash Flows from Operating Activities:
Net (loss)	$ (1,974)	$ (3,103)
Adjustments to reconcile net loss to net cash (used) provided by operating activities:
Depreciation and amortization	5	6
Deferred tax assets	80	222
Asset allowances and reserves	(177)	14
Changes in assets and liabilities:
Accounts receivable	1,312	(398)
Royalty receivable	(100)	36
Due to affiliates	5
Inventory	(1,454)	(2,233)
Prepaid purchases	324	(701)
Prepaid expenses and other current assets	(75)	918
Other assets	(6)	(71)
Accounts payable and other current liabilities	(167)	331
Deferred revenue	(50)
Income taxes payable	(250)	130
Net cash (used) by operating activities	(2,527)	(4,849)
Cash Flows From Investing Activities:
Proceeds from sale of short term investments	30,079	47,902
Purchases of short term investments	(28,110)	(45,057)
Additions to property, plant and equipment		(4)
Proceeds from disposals of property, plant and equipment	1
Net cash provided by investing activities	1,970	2,841
Cash Flows from Financing Activities:
Purchases of treasury stock	(2,611)	(4,644)
Net cash (used) by financing activities	(2,611)	(4,644)
Net (decrease) in cash and cash equivalents	(3,168)	(6,652)
Cash and cash equivalents at beginning of the period	25,096	27,471
Cash and cash equivalents at end of the period	21,928	20,819
Cash paid for:
Interest		3
Income taxes	$ 277	$ 4