CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities:
Net (loss)	$ (2,851)	$ (1,974)
Adjustments to reconcile net loss to net cash (used) by operating activities:
Amortization of right-of-use assets	36
Depreciation and amortization	1	5
Deferred tax assets	11	80
Asset allowances and reserves	18	(177)
Changes in assets and liabilities:
Accounts receivable	(276)	1,312
Royalty receivable	3	(100)
Due to affiliates		5
Inventory	933	(1,454)
Prepaid purchases	328	324
Prepaid expenses and other current assets	5	(75)
Other assets	60	(6)
Accounts payable and other current liabilities	266	(167)
Income taxes payable	(195)	(250)
Deferred revenue	(165)	(50)
Net cash (used) by operating activities	(1,826)	(2,527)
Cash Flows From Investing Activities:
Proceeds from sale of short-term investments	1,850	30,079
Purchases of short-term investments	(1,443)	(28,110)
Disposals of property, plant and equipment		1
Net cash provided by investing activities	407	1,970
Cash Flows from Financing Activities:
Purchases of treasury stock		(2,611)
Net cash (used) by financing activities		(2,611)
Net (decrease) in cash and cash equivalents	(1,419)	(3,168)
Cash and cash equivalents at beginning of the period	7,917	25,096
Cash and cash equivalents at end of the period	6,498	21,928
Cash paid for:
Income taxes	$ 199	$ 277