Consolidated Balance Sheets (USD $)	Jan. 31, 2013	Apr. 30, 2012
Current assets:
Cash and cash equivalents	$ 759,346	$ 3,274,741
Accounts receivable, less allowance for doubtful accounts and sales returns of $200,000 at January 31, 2013 and April 30, 2012	2,308,049	2,604,775
Inventories	2,912,637	2,932,072
Other current assets	115,698	115,652
Total current assets	6,095,730	8,927,240
Note receivable	750,000
Property and equipment, at cost:
Machinery and equipment	11,732,970	11,975,980
Leasehold improvements	607,867	607,867
Property and equipment, gross	12,340,837	12,583,847
Less: accumulated depreciation and amortization	11,841,475	11,885,435
Net property and equipment	499,362	698,412
Other assets	55,918	54,832
Intangible assets, net of accumulated amortization	173,866	296,566
Goodwill	1,521,555	1,453,034
Total assets	9,096,431	11,430,084
Current liabilities:
Note payable-revolving credit line	1,472,350	120,986
Accounts payable	630,812	1,017,328
Accrued liabilities	642,821	765,623
Due to related party - current portion	400,000	333,333
Total current liabilities	3,145,983	2,237,270
Due to related party - long term	1,366,667	1,666,667
Total liabilities	4,512,650	3,903,937
Stockholders' equity:
Common stock, par value $1.00 per share. Authorized 9,000,000 shares; 1,755,626 issued and outstanding at January 31, 2013 and 1,783,885 issued and 1,776,568 outstanding at April 30, 2012	1,755,626	1,783,885
Treasury stock 7,317 shares as of April 30, 2012 at cost		45,299
Additional paid-in capital	19,260,921	19,215,190
Accumulated deficit	(16,432,766)	(13,427,629)
Total stockholders' equity	4,583,781	7,526,147
Total liabilities and stockholders' equity	$ 9,096,431	$ 11,430,084