CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 20,567	$ 17,453	$ 17,972
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	770	660	867
Share based compensation	1,612	1,481	1,479
Discontinued project costs		1,714
Deferred income taxes	(23)	157	(183)
(Increase) decrease in operating assets and increase (decrease) in liabilities:
Accounts receivable	(53)	(264)	(417)
Inventories - finished goods	(518)	10,659	(4,126)
Prepaid income taxes	(243)	54	(54)
Prepaid expenses and other current assets	(1,055)	662	(1,237)
Accounts payable	(149)	(616)	(686)
Accrued expenses and other current liabilities	(65)	(61)	(42)
Income taxes payable	(50)	50	(162)
Net cash provided by operating activities	21,053	32,043	13,506
Cash flows from investing activities:
Proceeds from sale of short term investments	15,591
Net change in investments	54	(68)	(84)
Purchases of property and equipment	(20,130)	(918)	(45)
Net cash used in investing activities	(4,485)	(986)	(129)
Cash flows from financing activities:
Dividends paid	(14,684)	(13,807)	(13,326)
Tax adjustment related to stock compensation	142	58	99
Net cash used in financing activities	(14,542)	(13,749)	(13,227)
Net increase in cash and cash equivalents	2,026	17,308	150
Cash and cash equivalents, at beginning of year	35,613	18,305	18,155
Cash and cash equivalents, at end of year	37,639	35,613	18,305
Supplemental disclosure of cash flow information:
Cash paid for income taxes	12,173	10,026	10,727
Dividends payable in accrued expenses	$ 143	$ 212	$ 262