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Property and Equipment, net | 3 Months Ended
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Jul. 31, 2021
Property, Plant and Equipment [Abstract] |
Property and Equipment, net | (5) Property and Equipment, net The components of property and equipment, net as of July 31, 2021 and April 30, 2021 consisted of the following: Schedule of Components of Property and Equipment
|  | July 31, 2021 |  |  | April 30, 2021 |
|  | (in thousands)
Equipment |  | $ | 311 |  |  |  | 291 |
Computer equipment & software |  |  | 486 |  |  |  | 498 |
Office furniture & equipment |  |  | 339 |  |  |  | 341 |
Leasehold improvements |  |  | 474 |  |  |  | 474 |
Construction in process |  |  | 15 |  |  |  | 15 |
Property and equipment, gross |  | $ | 1,625 |  |  | $ | 1,619 |
Less: accumulated depreciation |  |  | (1,252 | ) |  |  | (1,213 | )
Property and equipment, net |  | $ | 373 |  |  | $ | 406 |
Depreciation expense was approximately $40,000 and $37,000 for the three-month periods ended July 31, 2021 and 2020, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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