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Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Income (Loss)	$ 1,680,000	$ 1,652,000	$ 3,377,000	$ 3,247,000
Weighted average number of shares outstanding, Basic	22,474,019	22,449,386	22,470,957	22,441,898
Basic earnings	$ 0.07	$ 0.07	$ 0.15	$ 0.14
Weighted average number of shares outstanding, Diluted	22,530,331	22,490,351	22,522,544	22,483,711
Diluted earnings	$ 0.07	$ 0.07	$ 0.15	$ 0.14
EpsComputationMember
Net Income (Loss)	$ 1,680,000	$ 1,652,000	$ 3,377,000	$ 3,247,000
Weighted average number of shares outstanding, Basic	22,474,019	22,449,386	22,470,957	22,441,898
Basic earnings	$ 0.07	$ 0.07	$ 0.15	$ 0.14
Weighted average number of shares outstanding, Diluted	22,474,019	22,449,386	22,470,957	22,441,898
Effect of dilutive stock options	56,312	40,965	51,587	41,813
Weighted average common shares and common stock equivalents	22,530,331	22,490,351	22,522,544	22,483,711
Diluted earnings	$ 0.07	$ 0.07	$ 0.15	$ 0.14

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