Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 37,740	$ 37,283	$ 23,819
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	2,225	2,126	1,369
Share based compensation	3,097	2,575	1,935
Deferred income taxes	125	(92)	1,951
Bad debt expense	85	112	421
(Increase) decrease in operating assets and increase (decrease) in liabilities:
Accounts receivable	(335)	(596)	(505)
Inventories - finished goods	1,967	(3,109)	5,358
Prepaid income taxes	206	(788)	243
Prepaid expenses and other current assets	(526)	137	1,416
Accounts payable	1,001	53	10,217
Accrued expenses and other current liabilities	(447)	337	321
Income taxes payable		(659)	659
Net cash provided by operating activities	45,138	37,379	47,204
Cash flows from investing activities:
Purchases of property and equipment	(620)	(703)	(10,604)
Net cash used in investing activities	(620)	(703)	(10,604)
Cash flows from financing activities:
Dividends paid	(21,925)	(17,470)	(15,509)
Net cash used in financing activities	(21,925)	(17,470)	(15,509)
Net increase in cash and cash equivalents	22,593	19,206	21,091
Cash and cash equivalents, at beginning of year	77,936	58,730	37,639
Cash and cash equivalents, at end of year	100,529	77,936	58,730
Supplemental disclosure of cash flow information:
Cash paid for income taxes	11,051	18,046	11,373
Dividends payable in accrued expenses	$ 203	$ 240	$ 217