Depreciation	9 Months Ended
Jan. 31, 2020
Accounting Policies [Abstract]
Depreciation (Details)	Equipment and leasehold improvements are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the respective assets. Repairs and maintenance are charged to expense as incurred; renewals and betterments which significantly extend the useful lives of existing equipment are capitalized. Significant leasehold improvements are capitalized and amortized over the term of the lease; equipment is depreciated over three to ten years. Depreciation expense was $4,298 and $6,852 for the nine month periods ending January 31, 2020 and 2019, respectively.

Depreciation

9 Months Ended

Jan. 31, 2020

Equipment and leasehold improvements are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives of the respective assets. Repairs and maintenance are charged to expense as incurred; renewals and betterments which significantly extend the useful lives of existing equipment are capitalized. Significant leasehold improvements are capitalized and amortized over the term of the lease; equipment is depreciated over three to ten years. Depreciation expense was $4,298 and $6,852 for the nine month periods ending January 31, 2020 and 2019, respectively.