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Supplemental Financial Information (Details - Other liabilities) - USD ($) $ in Thousands | Jun. 30, 2021 | Jun. 30, 2020
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Accrued variable consideration | $ 1,347 | $ 1,462
Customer deposits and refunds | 1,133 | 628
Accrued raw materials purchases | 176 | 272
Deferred revenue | 850 | 658
Lease liability | 1,174 | 1,273
Taxes payable | 388 | 395
Warranty reserve | 197 | 181
Accrued operating expenses | 2,063 | 1,439
Total other current liabilities | 7,328 | 6,308
Non-current |  |
Lease liability | 1,155 | 1,796
Deferred revenue | 241 | 166
Total other non-current liabilities | $ 1,396 | $ 1,962

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