Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Current assets:
Cash and cash equivalents	$ 106,562	$ 118,718
Accounts receivable, less allowance for doubtful accounts of $28 and $39, respectively	1,854	2,587
Inventories - finished goods, net	19,733	34,420
Prepaid expenses and other current assets	4,397	4,503
Prepaid income taxes	899	959
Total current assets	133,445	161,187
Noncurrent assets:
Property and equipment, net	25,081	25,450
Intangible assets	860	860
Total noncurrent assets	25,941	26,310
Total assets	159,386	187,497
Current liabilities:
Accounts payable	11,183	39,548
Accrued expenses and other current liabilities	5,089	5,387
Total current liabilities	16,272	44,935
Deferred tax liabilities	1,627	1,281
Total liabilities	17,899	46,216
Commitments and contingencies
Shareholders' equity:
Preferred stock, $.001 par value, 5,000 shares authorized; 3 convertible shares issued and outstanding with a liquidation preference of $4 per share	9	9
Common stock, $.001 par value, 40,000 shares authorized; 20,943 and 20,269 shares issued and outstanding, respectively	21	20
Additional paid-in capital	8,711	7,111
Retained earnings	132,746	134,141
Total shareholders' equity	141,487	141,281
Total liabilities and shareholders' equity	$ 159,386	$ 187,497