2. Summary of Significant Accounting Policies (Details - Impact on statement of operations and comprehensive loss ) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Apr. 30, 2019	[1]	Jan. 31, 2019	[1]	Oct. 31, 2018	[1]	Jul. 31, 2018	[1]	Apr. 30, 2018	[1]	Jan. 31, 2018	[1]	Oct. 31, 2017	[1]	Jul. 31, 2017	[1]	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
Revenues																	$ 53,603	$ 53,621	$ 57,630
Cost of revenues																	46,379	56,545	38,259
Gross profit	$ 3,648		$ 2,050		$ 334		$ 1,192		$ (1,961)		$ (4,132)		$ (3,460)		$ 6,629		7,224	(2,924)	19,371
Operating loss																	(5,622)	(20,638)	1,292
Loss from continuing operations																	(5,056)	$ (20,563)	$ 1,393
Balance Without Adoption of ASC 606 [Member]
Revenues																	40,360
Cost of revenues																	36,636
Gross profit																	3,724
Operating loss																	(9,122)
Loss from continuing operations																	(8,556)
Effect of Adoption [Member]
Revenues																	13,243
Cost of revenues																	9,743
Gross profit																	3,500
Operating loss																	3,500
Loss from continuing operations																	$ 3,500

[1] On May 1, 2018, we adopted ASC 606 using the modified retrospective method applied to all contracts not completed as of May 1, 2018 (Note 2). Under the modified retrospective method, results for the reporting periods beginning on or after May 1, 2018 are presented in accordance with ASC 606, while prior period amounts are not adjusted and continue to be reported under the accounting standards that were in effect prior to May 1, 2018.