Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Current assets:
Cash and cash equivalents	$ 100,529	$ 77,936
Accounts receivable, less allowance for doubtful accounts of $39 and $35, respectively	2,542	2,292
Inventories - finished goods	21,370	23,337
Prepaid expenses and other current assets	1,408	882
Prepaid income taxes	582	788
Total current assets	126,431	105,235
Noncurrent assets:
Property and equipment, net	27,136	28,741
Intangible assets	860	860
Total noncurrent assets	27,996	29,601
Total assets	154,427	134,836
Current liabilities:
Accounts payable	16,275	15,274
Accrued expenses and other current liabilities	2,351	2,835
Total current liabilities	18,626	18,109
Deferred tax liabilities	1,121	996
Total liabilities	19,747	19,105
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; 20,674 and 20,601 shares issued and outstanding, respectively	21	21
Additional paid-in capital	12,478	9,381
Retained earnings	122,172	106,320
Total shareholders' equity	134,680	115,731
Total liabilities and shareholders' equity	$ 154,427	$ 134,836