Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
Income Statement [Abstract]
Revenues	$ 6,438,961	$ 8,420,135	$ 21,396,469	$ 29,095,949
Costs and expenses:
Cost of sales	4,928,798	6,749,616	17,005,203	22,010,316
Engineering	152,388	181,142	548,224	560,505
Selling, general and administrative	2,069,826	3,149,333	6,613,321	9,978,428
Impairment of capitalized software		2,387,241		2,387,241
Total costs and expenses	7,151,012	12,467,332	24,166,748	34,936,490
Loss from operations	(712,051)	(4,047,197)	(2,770,279)	(5,840,541)
Other income (expense):
Interest expense, net	(73,586)	(100,077)	(216,336)	(298,294)
Currency gain (loss), net	3,974	(30,456)	(18,522)	(71,727)
Total other expense, net	(69,612)	(130,533)	(234,858)	(370,021)
Loss before income taxes	(781,663)	(4,177,730)	(3,005,137)	(6,210,562)
Income tax expense		4,881		4,881
Net loss	$ (781,663)	$ (4,182,611)	$ (3,005,137)	$ (6,215,443)
Net loss per share of common stock
Basic	$ (0.44)	$ (2.34)	$ (1.68)	$ (3.52)
Diluted	$ (0.44)	$ (2.34)	$ (1.68)	$ (3.52)