Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Current assets:
Cash and cash equivalents	$ 92,374	$ 100,529
Accounts receivable, less allowance for doubtful accounts of $31 and $39, respectively	2,052	2,542
Inventories - finished goods	24,165	21,370
Prepaid expenses and other current assets	4,176	1,408
Prepaid income taxes		582
Total current assets	122,767	126,431
Noncurrent assets:
Property and equipment, net	25,917	27,136
Intangible assets	860	860
Total noncurrent assets	26,777	27,996
Total assets	149,544	154,427
Current liabilities:
Accounts payable	16,635	16,275
Accrued expenses and other current liabilities	3,195	2,351
Income taxes payable	895
Total current liabilities	20,725	18,626
Deferred tax liabilities	1,109	1,121
Total liabilities	21,834	19,747
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; 20,166 and 20,674 shares issued and outstanding, respectively	20	21
Additional paid-in capital	3,063	12,478
Retained earnings	124,618	122,172
Total shareholders' equity	127,710	134,680
Total liabilities and shareholders' equity	$ 149,544	$ 154,427