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Note 10 - Accounting for the Costs of Computer Software Developed for Internal Use	9 Months Ended
	Jan. 31, 2017
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 obtaining software for internal use and amortize those costs over the software's estimated useful life in a systematic and rational manner. The Company capitalized $411,000 and $1,337,000 related to the development of software for internal use for the nine months ended January 31, 2017 and 2016, respectively. Capitalized software includes $215,000 and $975,000 of internal costs to develop software and $196,000 and $362,000 of third party programmers' costs for the nine months ended January 31, 2017, and January 31, 2016, respectively. Such costs are capitalized and amortized over the expected useful life of the asset which is 3 to 5 years. Total amortization expenses for the nine months ended January 31, 2017 and January 31, 2016, were $3,558,000 and $1,985,000, respectively. An increase of $1,573,000 was primarily attributable to additional amortization of internally developed software costs related to the product production cycle that is expected to be upgraded during fiscal 2018.