Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 68,525	$ 58,730
Accounts receivable, less allowance for doubtful accounts of $31 and $27, respectively	2,059	1,808
Inventories - finished goods	23,032	20,228
Prepaid expenses and other current assets	1,513	1,019
Total current assets	95,129	81,785
Noncurrent assets:
Property and equipment, net	29,676	30,164
Intangible assets	860	860
Total noncurrent assets	30,536	31,024
Total assets	125,665	112,809
Current liabilities:
Accounts payable	16,205	15,221
Accrued expenses and other current liabilities	3,217	2,475
Income taxes payable	6,227	659
Total current liabilities	25,649	18,355
Deferred tax liabilities	985	1,088
Total liabilities	26,634	19,443
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; 20,525 and 20,526 shares issued and outstanding, respectively	21	21
Additional paid-in capital	7,300	6,806
Retained earnings	91,701	86,530
Total shareholders' equity	99,031	93,366
Total liabilities and shareholders' equity	$ 125,665	$ 112,809