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Note 10 - Accounting for the Costs of Computer Software Developed for Internal Use	3 Months Ended
	Jul. 31, 2018
Notes to Financial Statements
Internal Use Software Disclosure [Text Block]	Note 10 - Accounting for the Costs of Computer Software Developed for Internal Use: The Company has adopted the provisions of the Statement of Position 98 - 1 (SOP 98 - 1 ), "Accounting for the Costs of Computer Software Developed for Internal Use". SOP 98 - 1 requires companies to capitalize as long-lived assets many of the costs associated with developing or purchasing software for internal use and amortize those costs over the software's estimated useful life in a systematic and rational manner. The Company did not incur and did not capitalize expenditures related to the development of software for internal use during the three months ended July 31, 2018 or July 31, 2017. Total amortization expenses during the three months ended July 31, 2018 and July 31, 2017, were $44,000 and $165,000, respectively.

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Disclosure of accounting policy for its computer software activities including the accounting treatment for costs incurred for (1) research and development activities, (2) development of computer software for internal use, (3) in-process research and development acquired in a purchase business combination.

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