Condensed Consolidated Statements of Cash Flows (Current Period Unaudited) (USD $)	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 594,621	$ 644,445
Loss on disposal of equipment	0	541
Change in accounts receivable and inventory reserves	51,032	16,457
Depreciation and amortization	325,654	243,247
Change in cash surrender value of life insurance	(17,001)	(34,002)
Warranty reserve	94,447	99,186
Compensation expense related to stock options	12,449	1,000
Accounts receivable	(1,465,530)	644,815
Notes receivable and other non-trade receivables	56,078	212,676
Inventories	(5,770,909)	565,144
Prepaid expenses and other	(898,030)	304,460
Accounts payable	1,899,948	(1,878,760)
Accrued expenses	(128,949)	(363,224)
Income taxes receivable/ payable	(183,000)	315,000
Total adjustments	(6,023,811)	126,540
Net cash provided by (used in) operating activities	(5,429,190)	770,985
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(144,275)	(220,606)
Proceeds from sale of assets	0	3,500
Net cash used in investing activities	(144,275)	(217,106)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Line of Credit	783,222
Payment of cash dividend	(733,885)	(611,571)
Net cash provided by (used in) financing activities	49,337	(611,571)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(5,524,128)	(57,692)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	9,197,492	5,814,184
CASH AND CASH EQUIVALENTS AT END OF PERIOD	3,673,364	5,756,492
SUPPLEMENTAL SCHEDULE OF NON-CASH INVESTING ACTIVITIES:
Finished goods inventory transferred to equipment leased to customers	788,239
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	900	17,000
Income taxes	$ 573,000	$ 46,000