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UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Thousands | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings | Treasury Stock | Cumulative Effect, Period of Adoption, Adjustment | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Jun. 30, 2019 | $ 4 | $ 713,436 | $ (40) |  | $ 22,447 | $ (102,482) |  | $ 633,365
Balance (in shares) at Jun. 30, 2019 | 45,575,236 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | (9,730) |  |  | (9,730)
Foreign currency translation adjustment |  |  | 139 |  |  |  |  | 139
Stock-based compensation expense |  | 5,594 |  |  |  |  |  | 5,594
Exercise of stock options |  | 42 |  |  |  |  |  | 42
Exercise of stock options (in shares) | 2,500 |  |  |  |  |  |  |
Issuance of restricted stock awards (in shares) | 918,702 |  |  |  |  |  |  |
Forfeiture of restricted stock awards (in shares) | (34,090) |  |  |  |  |  |  |
Repurchase of restricted stock for tax withholding |  | (4,698) |  |  |  |  |  | (4,698)
Repurchase of restricted stock for tax withholding (in shares) | (171,778) |  |  |  |  |  |  |
Balance at Sep. 30, 2019 | $ 4 | 714,374 | 99 |  | 12,717 | $ (102,482) |  | 624,712
Balance (in shares) at Sep. 30, 2019 | 46,290,570 |  |  |  |  | (5,334,743) |  |
Balance at Jun. 30, 2019 | $ 4 | 713,436 | (40) |  | 22,447 | $ (102,482) |  | 633,365
Balance (in shares) at Jun. 30, 2019 | 45,575,236 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  | 19,618
Balance at Mar. 31, 2020 | $ 4 | 724,992 | 49 |  | 42,065 | $ (102,482) |  | 664,628
Balance (in shares) at Mar. 31, 2020 | 46,274,270 |  |  |  |  | (5,334,743) |  |
Balance at Sep. 30, 2019 | $ 4 | 714,374 | 99 |  | 12,717 | $ (102,482) |  | 624,712
Balance (in shares) at Sep. 30, 2019 | 46,290,570 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | 20,594 |  |  | 20,594
Foreign currency translation adjustment |  |  | (287) |  |  |  |  | (287)
Stock-based compensation expense |  | 6,256 |  |  |  |  |  | 6,256
Exercise of stock options |  | 6 |  |  |  |  |  | 6
Exercise of stock options (in shares) | 500 |  |  |  |  |  |  |
Issuance of restricted stock awards (in shares) | 18,000 |  |  |  |  |  |  |
Forfeiture of restricted stock awards (in shares) | (18,019) |  |  |  |  |  |  |
Repurchase of restricted stock for tax withholding |  | (185) |  |  |  |  |  | (185)
Repurchase of restricted stock for tax withholding (in shares) | (8,878) |  |  |  |  |  |  |
Balance at Dec. 31, 2019 | $ 4 | 720,451 | (188) |  | 33,311 | $ (102,482) |  | 651,096
Balance (in shares) at Dec. 31, 2019 | 46,282,173 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | 8,754 |  |  | 8,754
Foreign currency translation adjustment |  |  | 237 |  |  |  |  | 237
Stock-based compensation expense |  | 6,162 |  |  |  |  |  | 6,162
Issuance of restricted stock awards (in shares) | 108,959 |  |  |  |  |  |  |
Forfeiture of restricted stock awards (in shares) | (23,900) |  |  |  |  |  |  |
Repurchase of restricted stock for tax withholding |  | (1,621) |  |  |  |  |  | (1,621)
Repurchase of restricted stock for tax withholding (in shares) | (92,962) |  |  |  |  |  |  |
Balance at Mar. 31, 2020 | $ 4 | 724,992 | 49 |  | 42,065 | $ (102,482) |  | 664,628
Balance (in shares) at Mar. 31, 2020 | 46,274,270 |  |  |  |  | (5,334,743) |  |
Balance (ASU 2016-13) at Jun. 30, 2020 |  |  |  | $ (6,253) |  |  | $ (6,253) |
Balance at Jun. 30, 2020 | $ 4 | 730,761 | 93 |  | 46,953 | $ (102,482) |  | 675,329
Balance (in shares) at Jun. 30, 2020 | 46,341,627 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | 12,666 |  |  | 12,666
Foreign currency translation adjustment |  |  | (192) |  |  |  |  | (192)
Stock-based compensation expense |  | 9,009 |  |  |  |  |  | 9,009
Exercise of stock options |  | 32 |  |  |  |  |  | 32
Exercise of stock options (in shares) | 948,867 |  |  |  |  |  |  |
Withholding of stock options for tax withholding |  | (10,885) |  |  |  |  |  | (10,885)
Withholding of stock options for tax withholding (in shares) | (655,219) |  |  |  |  |  |  |
Equity component of convertible senior notes, net of issuance costs and taxes |  | 105,477 |  |  |  |  |  | 105,477
Purchases of capped calls in connection with convertible senior notes |  | (60,354) |  |  |  |  |  | (60,354)
Issuance of restricted stock awards (in shares) | 383,223 |  |  |  |  |  |  |
Forfeiture of restricted stock awards (in shares) | (9,329) |  |  |  |  |  |  |
Repurchase of restricted stock for tax withholding |  | (5,808) |  |  |  |  |  | (5,808)
Repurchase of restricted stock for tax withholding (in shares) | (136,194) |  |  |  |  |  |  |
Balance at Sep. 30, 2020 | $ 4 | 768,232 | (99) |  | 53,366 | $ (102,482) |  | 719,021
Balance (in shares) at Sep. 30, 2020 | 46,872,975 |  |  |  |  | (5,334,743) |  |
Balance (ASU 2016-13) at Jun. 30, 2020 |  |  |  | $ (6,253) |  |  | $ (6,253) |
Balance at Jun. 30, 2020 | $ 4 | 730,761 | 93 |  | 46,953 | $ (102,482) |  | 675,329
Balance (in shares) at Jun. 30, 2020 | 46,341,627 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  | $ 60,956
Exercise of stock options (in shares) |  |  |  |  |  |  |  | 988,317
Balance at Mar. 31, 2021 | $ 4 | 788,028 | (427) |  | 101,656 | $ (102,482) |  | $ 786,779
Balance (in shares) at Mar. 31, 2021 | 46,877,934 |  |  |  |  | (5,334,743) |  |
Balance at Sep. 30, 2020 | $ 4 | 768,232 | (99) |  | 53,366 | $ (102,482) |  | 719,021
Balance (in shares) at Sep. 30, 2020 | 46,872,975 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | 24,501 |  |  | 24,501
Foreign currency translation adjustment |  |  | (270) |  |  |  |  | (270)
Stock-based compensation expense |  | 9,181 |  |  |  |  |  | 9,181
Exercise of stock options |  | 271 |  |  |  |  |  | 271
Exercise of stock options (in shares) | 15,000 |  |  |  |  |  |  |
Equity component of convertible senior notes, net of issuance costs and taxes |  | 25 |  |  |  |  |  | 25
Issuance of restricted stock awards (in shares) | 19,500 |  |  |  |  |  |  |
Forfeiture of restricted stock awards (in shares) | (2,122) |  |  |  |  |  |  |
Repurchase of restricted stock for tax withholding |  | (300) |  |  |  |  |  | (300)
Repurchase of restricted stock for tax withholding (in shares) | (11,419) |  |  |  |  |  |  |
Balance at Dec. 31, 2020 | $ 4 | 777,409 | (369) |  | 77,867 | $ (102,482) |  | 752,429
Balance (in shares) at Dec. 31, 2020 | 46,893,934 |  |  |  |  | (5,334,743) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  | 23,789 |  |  | 23,789
Foreign currency translation adjustment |  |  | (58) |  |  |  |  | (58)
Stock-based compensation expense |  | 12,962 |  |  |  |  |  | 12,962
Exercise of stock options |  | 421 |  |  |  |  |  | 421
Exercise of stock options (in shares) | 24,450 |  |  |  |  |  |  |
Issuance of restricted stock awards (in shares) | 117,085 |  |  |  |  |  |  |
Forfeiture of restricted stock awards (in shares) | (57,435) |  |  |  |  |  |  |
Repurchase of restricted stock for tax withholding |  | (2,764) |  |  |  |  |  | (2,764)
Repurchase of restricted stock for tax withholding (in shares) | (100,100) |  |  |  |  |  |  |
Balance at Mar. 31, 2021 | $ 4 | $ 788,028 | $ (427) |  | $ 101,656 | $ (102,482) |  | $ 786,779
Balance (in shares) at Mar. 31, 2021 | 46,877,934 |  |  |  |  | (5,334,743) |  |

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