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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Jun. 30, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Components of accounts receivable | Components of accounts receivable consisted of (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30,
​ |  | 2019 |  | 2020
Accounts receivables | ​ | $ | 253,504 |  | $ | 287,488
Less allowance for doubtful accounts | ​ |  | (15,064) | ​ |  | (17,648)
Total | ​ | $ | 238,440 | ​ | $ | 269,840
Summary of fair values of financial assets and liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2019 |  | June 30, 2020
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets—Insurance company contracts | ​ | $ | — | ​ | $ | 35,899 | ​ | $ | — | ​ | $ | 35,899 | ​ | $ | — | ​ | $ | 37,155 | ​ | $ | — | ​ | $ | 37,155
Liabilities—Contingent consideration | ​ | $ | — | ​ | $ | — | ​ | $ | 16,577 | ​ | $ | 16,577 | ​ | $ | — | ​ | $ | — | ​ | $ | 13,867 | ​ | $ | 13,867
Schedule of computation of basic and diluted earnings per share | The following table sets forth the computation of basic and diluted earnings (loss) per share (in thousands, except per share amounts): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2018 |  | 2019 |  | 2020
Net income (loss) available to common stockholders | ​ | $ | (29,127) | ​ | $ | 64,796 | ​ | $ | 75,252
Weighted average shares outstanding—basic | ​ |  | 18,592 | ​ |  | 18,097 | ​ |  | 18,191
Dilutive effect of equity awards | ​ |  | — | ​ |  | 623 | ​ |  | 409
Weighted average shares outstanding—diluted | ​ |  | 18,592 | ​ |  | 18,720 | ​ |  | 18,600
Basic earnings (loss) per share | ​ | $ | (1.57) | ​ | $ | 3.58 | ​ | $ | 4.14
Diluted earnings (loss) per share | ​ | $ | (1.57) | ​ | $ | 3.46 | ​ | $ | 4.05
Weighted average shares excluded from diluted earnings (loss) per share due to their anti-dilutive effect | ​ | ​ | 1,280 | ​ | ​ | 40 | ​ | ​ | 120
Schedule of changes in warranty provisions | ​
​ | ​ | ​ | ​
Warranty provision as of June 30, 2017 |  | $ | 15,178
Warranty claims provided for/assumed in acquisition | ​ |  | 14,156
Settlements made | ​ |  | (7,515)
Warranty provision as of June 30, 2018 | ​ | $ | 21,819
Warranty claims provided for/assumed in acquisition | ​ |  | 8,867
Settlements made | ​ |  | (8,962)
Warranty provision as of June 30, 2019 | ​ | $ | 21,724
Warranty claims provided for/assumed in acquisition | ​ |  | 7,551
Settlements made | ​ |  | (8,450)
Warranty provision as of June 30, 2020 | ​ | $ | 20,825
Schedule of components of operating lease expense | The components of operating lease expense for the year ended June 30, 2020 were as follows (in thousands):
​ | ​ | ​ | ​
​ |  | 2020
Operating lease cost | ​ | $ | 10,232
Variable lease cost | ​ |  | 746
Short-term lease cost | ​ |  | 943
​ | ​ | $ | 11,921
​
Schedule of supplemental balance sheet assets and liabilities related to operating leases | Supplemental balance sheet assets and liabilities related to operating leases were as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Balance Sheet Category |  | June 30, 2020 |
Operating lease ROU assets, net |  | Other assets | ​ | $ | 27,936 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Operating lease liabilities, current portion |  | Other accrued expenses and current liabilities | ​ | $ | 8,537 | ​
Operating lease liabilities, long-term |  | Other long-term liabilities | ​ |  | 19,713 | ​
Total operating lease liabilities | ​ | ​ | ​ | $ | 28,250 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average remaining lease term | ​ | ​ | ​ |  | 4.4 years | ​
Weighted average discount rate | ​ | ​ |  |  | 4.3 | %
​
Schedule of supplemental cash flow information related to operating leases | Supplemental cash flow information related to operating leases for the year ended June 30, 2020 was as follows (in thousands):
​ | ​ | ​ | ​
​ |  | 2020
Cash paid for operating lease liabilities | ​ | $ | 7,664
ROU assets obtained in exchange for new lease obligations | ​ |  | 3,718
​
Schedule of maturities of operating lease liabilities | Maturities of operating lease liabilities under ASC 842 (defined below) at June 30, 2020 were as follows (in thousands):
​ | ​ | ​ | ​
​ |  | June 30, 2020
Less than one year | ​ | $ | 9,515
1 – 2 years | ​ |  | 6,700
2 – 3 years | ​ |  | 4,511
3 – 4 years | ​ |  | 3,937
4 – 5 years | ​ |  | 2,667
Thereafter | ​ |  | 3,890
​ | ​ |  | 31,220
Less: Imputed interest | ​ |  | (2,970)
Total lease liabilities | ​ | $ | 28,250
Schedule of cumulative effect of the changes made to consolidated condensed balance sheet for the adoption of the new lease standard | The cumulative effect of the changes made to our July 1, 2019 consolidated condensed balance sheet for the adoption of the new lease standard was as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Effect of | ​ | ​ | ​
​ | ​ | Balance at | ​ | Adoption | ​ | Balance at
Balance Sheet |  | June 30, 2019 |  | of ASC 842 |  | July 1, 2019
Assets | ​ | ​ | ​ |  | ​ |  |  | ​ |
Other assets | ​ | $ | 56,518 | ​ | $ | 30,066 | ​ | $ | 86,584
Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other accrued expenses and current liabilities | ​ | $ | 112,956 | ​ | $ | 8,324 | ​ | $ | 121,280
Other long-term liabilities | ​ |  | 65,398 | ​ |  | 21,742 | ​ |  | 87,140
​

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