Related Party Transactions (Details) (USD $)	3 Months Ended		9 Months Ended						3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended							3 Months Ended		9 Months Ended								3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012	Apr. 30, 2012	Jan. 31, 2013 PGMC [Member] Lottery Products [Member]	Apr. 30, 2012 PGMC [Member] Lottery Products [Member]	Dec. 20, 2011 PGMC [Member] Lottery Products [Member] Order One [Member]	Jan. 31, 2013 PGMC [Member] Lottery Products and Support Services [Member]	Jan. 31, 2012 PGMC [Member] Lottery Products and Support Services [Member]	Jan. 31, 2013 PGMC [Member] Lottery Products and Support Services [Member]	Jan. 31, 2012 PGMC [Member] Lottery Products and Support Services [Member]	Jan. 31, 2013 BLM [Member]	Jan. 31, 2012 BLM [Member]	Jan. 31, 2013 BLM [Member]	Jan. 31, 2012 BLM [Member]	Apr. 30, 2012 BLM [Member]	Jan. 31, 2013 Sports Toto Malaysia Sdn. Bhd. [Member]	Apr. 30, 2012 Sports Toto Malaysia Sdn. Bhd. [Member]	Dec. 21, 2011 Sports Toto Malaysia Sdn. Bhd. [Member]	Jan. 11, 2013 Sports Toto Malaysia Sdn. Bhd. [Member] Lottery Products [Member]	Jan. 31, 2013 Sports Toto Malaysia Sdn. Bhd. [Member] Contract Deliverables and Sale of Support Services [Member]	Jan. 31, 2012 Sports Toto Malaysia Sdn. Bhd. [Member] Contract Deliverables and Sale of Support Services [Member]	Jan. 31, 2013 Sports Toto Malaysia Sdn. Bhd. [Member] Contract Deliverables and Sale of Support Services [Member]	Jan. 31, 2012 Sports Toto Malaysia Sdn. Bhd. [Member] Contract Deliverables and Sale of Support Services [Member]	Jan. 31, 2013 Sports Toto Malaysia Sdn. Bhd. [Member] Software Support Services [Member]	Apr. 30, 2012 Sports Toto Malaysia Sdn. Bhd. [Member] Software Support Services [Member]	Jan. 31, 2013 Natural Avenue Sdn. Bhd. [Member]	Apr. 30, 2012 Natural Avenue Sdn. Bhd. [Member]	Jan. 31, 2013 Natural Avenue Sdn. Bhd. [Member] Lottery Product Licensing [Member]	Apr. 30, 2012 Natural Avenue Sdn. Bhd. [Member] Lottery Product Licensing [Member]	Jan. 31, 2013 Natural Avenue Sdn. Bhd. [Member] Support Services and Licensing [Member]	Jan. 31, 2012 Natural Avenue Sdn. Bhd. [Member] Support Services and Licensing [Member]	Jan. 31, 2013 Natural Avenue Sdn. Bhd. [Member] Support Services and Licensing [Member]	Jan. 31, 2012 Natural Avenue Sdn. Bhd. [Member] Support Services and Licensing [Member]	Jan. 31, 2013 Sports Toto Computers Sdn. Bhd. [Member]	Jan. 31, 2012 Sports Toto Computers Sdn. Bhd. [Member]	Jan. 31, 2013 Sports Toto Computers Sdn. Bhd. [Member]	Jan. 31, 2012 Sports Toto Computers Sdn. Bhd. [Member]
Related Party Transaction [Line Items]
Revenue from related party	$ 646,000	$ 2,000,000	$ 3,700,000	$ 3,500,000					$ 2,000	$ 1,700,000	$ 1,100,000	$ 3,000,000	$ 0	$ 0	$ 0	$ 0						$ 609,000	$ 245,000	$ 2,500,000	$ 400,000							$ 35,000	$ 36,000	$ 105,000	$ 119,000
Sales revenue, related party, percentage (in hundredths)	32.00%	44.00%	48.00%	50.00%
Accounts receivable from related parties	69,000		69,000			55,000	189,000						0		0		0	14,000	0									0	0
Outstanding voting stock held by Berjaya Lottery Management (H.K.) Ltd. (in hundredths)	71.30%		71.30%
Payable to parent	252,000		252,000		252,000								252,000		252,000		252,000
Inventories	1,570,000		1,570,000		2,659,000								0		0		0
Deferred revenues	2,408,000		2,408,000		687,000	0	264,000	1,100,000												4,300,000	11,000,000					9,000	9,000			0	4,000
Net cost and estimated earnings in excess of billings	60,000		60,000		726,000													60,000	726,000
Services incurred																																				$ 65,000	$ 51,000	$ 145,000	$ 152,000