Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,891,103	$ 594,621
Adjustments to reconcile net income to net cash used in operating activities:
Gain on sale of investment securities available for sale	(8,410)
Gain on disposal of equipment	(273,862)
Change in accounts receivable and inventory reserves	(275,203)	51,032
Depreciation and amortization	439,171	325,654
Change in cash surrender value of life insurance	(5,246)	(17,001)
Warranty reserve	(151,600)	94,447
Compensation expense related to stock options	8,958	12,449
Change in operating assets and liabilities:
Accounts receivable	(6,508,320)	(1,465,530)
Notes receivable and other non-trade receivables	443,227	56,078
Inventories	3,638,530	(5,770,909)
Prepaid expenses and other	210,050	(898,030)
Accounts payable	(797,292)	1,899,948
Accrued expenses	34,710	(128,949)
Income taxes receivable/ payable	777,735	(183,000)
Total adjustments	(2,467,553)	(6,023,811)
Net cash used in operating activities	(576,450)	(5,429,190)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of investment securities available for sale	(3,973,218)
Proceeds from sale of investment securities available for sale	511,571
Capital expenditures	(1,553,223)	(144,275)
Proceeds from sale of assets	823,671
Net cash used in investing activities	(4,191,199)	(144,275)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from line of credit	1,330,888	783,222
Payment of cash dividend		(733,885)
Repurchase of stock options	(112,935)
Net cash provided by financing activities	1,217,953	49,337
NET DECREASE IN CASH AND CASH EQUIVALENTS	(3,549,696)	(5,524,128)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	3,758,888	9,197,492
CASH AND CASH EQUIVALENTS AT END OF PERIOD	209,192	3,673,364
SUPPLEMENTAL SCHEDULE OF NON-CASH INVESTING ACTIVITIES:
Finished goods inventory transferred to equipment leased to customers	1,132,115	788,239
Cash paid during the period for:
Interest	16,280	900
Income taxes	$ 804,200	$ 573,000

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The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Total increases or decreases in the standard and extended product warranty liability during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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