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WARRANTY ACCRUAL | 12 Months Ended
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Jun. 30, 2019
Product Warranties Disclosures [Abstract] |
WARRANTY ACCRUAL | 4. WARRANTY ACCRUAL Information relating to the accrual for warranty costs for the years ended June 30, 2019 and 2018 is as follows (in thousands):
|  | June 30, |
|  | 2019 |  |  | 2018 |
Balance at beginning of year |  | $ | 107 |  |  | $ | 159 |
Accruals during the year |  |  | 119 |  |  |  | 102 |
Change in estimates of prior period accruals |  |  | (18 | ) |  |  | (97 | )
Warranty amortization |  |  | (72 | ) |  |  | (57 | )
Balance at end of year |  | $ | 136 |  |  | $ | 107 |
Warranty expense relating to new product sales and changes to estimates was $101,000 and $5,000, respectively, for the fiscal years ended June 30, 2019 and 2018.

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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI http://asc.fasb.org/topic&trid=2155896 + Details
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