CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities:
Net (loss)	$ (6,851)	$ (237)
Adjustments to reconcile net loss to net cash (used) provided by operating activities:
Depreciation and amortization	8	16
Deferred tax assets	263	610
Asset allowances and reserves	(166)	(554)
Changes in assets and liabilities:
Accounts receivable	(510)	2,146
Royalty receivable	36	1,193
Inventory	(2,326)	1,218
Prepaid purchases	390	121
Prepaid expenses and other current assets	997	(938)
Other assets	(50)	31
Accounts payable and other current liabilities	47	(935)
Due to affiliates		(512)
Deferred revenue	50
Income taxes payable	2,956	(290)
Net cash (used) provided by operating activities	(5,156)	1,869
Cash Flows From Investing Activities:
Proceeds from sale of short term investments	70,136	33,209
Purchases of short term investments	(61,058)	(38,132)
Proceeds from restricted cash		500
Additions to property, plant and equipment	(4)	(5)
Net cash provided (used) by investing activities	9,074	(4,428)
Cash Flows from Financing Activities:
Purchases of treasury stock	(6,293)	(66)
Net cash (used) by financing activities	(6,293)	(66)
Net (decrease) in cash and cash equivalents	(2,375)	(2,625)
Cash and cash equivalents at beginning of the year	27,471	30,096
Cash and cash equivalents at end of the year	25,096	27,471
Cash paid for:
Interest	4	2
Income taxes	$ 320	$ 1,524