Borrowings (Details) (USD $)	9 Months Ended
	Jan. 31, 2013 Note
Line of Credit [Member]
Debt Instrument [Line Items]
Number of lines of credit	1
Line of credit facility borrowing capacity	$ 1,000,000
Unused line	163,000
Notes Collateralized by Aircraft Security Agreements [Member]
Debt Instrument [Line Items]
Notes payable	2,132,000
Notes Payable to Bank [Member]
Debt Instrument [Line Items]
Notes payable	1,746,000
Number of notes	3
Notes payable due date	Mar. 31, 2013
Notes for Real Estate [Member]
Debt Instrument [Line Items]
Notes payable	336,000
Number of notes	1
Note Collateralized by First and Second Position on All Assets of The Company [Member]
Debt Instrument [Line Items]
Notes payable	266,000
Number of notes	1
Notes Collateralized by Automobiles and Equipment [Member]
Debt Instrument [Line Items]
Notes payable	155,000
Note With Konami Gaming [Member]
Debt Instrument [Line Items]
Notes payable	1,382,000
Number of notes	1
Face value of note entered	$ 1,733,000