Consolidated Statements of Cash Flows - Unaudited - USD ($)	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities
NET INCOME	$ 11,778,000	$ 8,775,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,633,000	5,303,000
(Gain) loss on write down or disposal of property, capitalized software or investment	(49,000)	288,000
Stock compensation expense	1,179,000	922,000
Provision for doubtful accounts	1,313,000	276,000
Deferred income tax	(294,000)	(328,000)
Changes in operating assets and liabilities
Accounts receivable	(2,497,000)	(203,000)
Customer deposits	(199,000)	741,000
Prepaid taxes and expenses	(887,000)	38,000
Other assets	16,000	178,000
Accounts and taxes payable	2,538,000	4,096,000
Accrued liabilities	4,274,000	1,293,000
Net cash provided by operating activities	22,805,000	21,379,000
Cash Flows from Investing Activities
Purchase of property and equipment	(2,969,000)	(5,299,000)
Net cash (used in) investing activities	(2,969,000)	(5,299,000)
Cash Flows from Financing Activities
Purchase of treasury stock	(3,486,000)	(11,187,000)
Tax effect of stock option exercises	0	768,000
Exercise of common stock options	1,219,000	737,000
Net cash (used in) financing activities	(2,267,000)	(9,682,000)
Increase in cash and cash equivalents	17,569,000	6,398,000
Cash and cash equivalents at beginning of period	55,771,000	28,611,000
Cash and cash equivalents at end of period	73,340,000	35,009,000
Supplemental Cash Flow Information:
Income taxes paid	$ 56,000	$ 152,000