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Equity | 6 Months Ended
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Jun. 30, 2020
Stockholders' Equity |
Stockholders' Equity | ​ Note 7 — Equity ​ Statement of Stockholders’ Equity ​ The following tables present the changes in Stockholders’ Equity: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Accumulated |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Additional | ​ | ​ | ​ | ​ | Other | ​ | ​ | ​
​ | ​ | Common Stock | ​ | Paid-in | ​ | Accumulated | ​ | Comprehensive | ​ | ​ | ​
​ | ​ | Shares | ​ | Amount | ​ | Capital | ​ | Deficit | ​ | Income | ​ | Total
​ | ​ | (in thousands)
Balance at December 31, 2019 |  | 48,994 | ​ | $ | 490 | ​ | $ | 1,071,058 | ​ | $ | (698,930) | ​ | $ | 1,894 | ​ | $ | 374,512
Net loss |  | — | ​ |  | — | ​ |  | — | ​ |  | (567) | ​ |  | — | ​ |  | (567)
Other comprehensive income (loss), net of tax |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 153 | ​ |  | 153
Share-based compensation expense |  | — | ​ |  | — | ​ |  | 3,646 | ​ |  | — | ​ |  | — | ​ |  | 3,646
Net issuance under employee stock plans |  | 434 | ​ | ​ | 4 | ​ | ​ | (684) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (680)
Balance at March 31, 2020 |  | 49,428 | ​ | $ | 494 | ​ | $ | 1,074,020 | ​ | $ | (699,497) | ​ | $ | 2,047 | ​ | $ | 377,064
Net loss |  | — | ​ |  | — | ​ |  | — | ​ |  | (8,302) | ​ |  | — | ​ |  | (8,302)
Other comprehensive income (loss), net of tax |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (130) | ​ |  | (130)
Share-based compensation expense |  | — | ​ |  | — | ​ |  | 2,974 | ​ |  | — | ​ |  | — | ​ |  | 2,974
Net issuance under employee stock plans |  | 191 | ​ | ​ | 3 | ​ | ​ | 752 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 755
Extinguishment of equity component of repurchased 2023 Notes | ​ | — | ​ | ​ | — | ​ | ​ | (80) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (80)
Equity component of 2027 Notes | ​ | — | ​ | ​ | — | ​ | ​ | 33,363 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 33,363
Purchase of capped calls | ​ | — | ​ | ​ | — | ​ | ​ | (10,313) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (10,313)
Balance at June 30, 2020 |  | 49,619 | ​ | $ | 497 | ​ | $ | 1,100,716 | ​ | $ | (707,799) | ​ | $ | 1,917 | ​ | $ | 395,331
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | Accumulated |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Additional | ​ | ​ | ​ | ​ | Other | ​ | ​ | ​
​ | ​ | Common Stock | ​ | Treasury Stock | ​ | Paid-in | ​ | Accumulated | ​ | Comprehensive | ​ | ​ | ​
​ | ​ | Shares | ​ | Amount | ​ | Shares |  | Amount | ​ | Capital | ​ | Deficit | ​ | Income | ​ | Total
​ | ​ | (in thousands)
Balance at December 31, 2018 |  | 48,547 | ​ | $ | 485 | ​ | ​ | 523 | ​ | $ | (5,872) | ​ | $ | 1,061,325 | ​ | $ | (619,983) | ​ | $ | 1,820 | ​ | $ | 437,775
Net loss |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (18,530) | ​ |  | — | ​ |  | (18,530)
Other comprehensive income (loss), net of tax |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 38 | ​ |  | 38
Share-based compensation expense |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 3,157 | ​ |  | — | ​ |  | — | ​ |  | 3,157
Net issuance under employee stock plans | ​ | 128 | ​ | ​ | 2 | ​ | ​ | (523) | ​ | ​ | 5,872 | ​ | ​ | (6,303) | ​ | ​ | (213) | ​ | ​ | — | ​ | ​ | (642)
Balance at March 31, 2019 |  | 48,675 | ​ | $ | 487 | ​ | ​ | — | ​ | $ | — | ​ | $ | 1,058,179 | ​ | $ | (638,726) | ​ | $ | 1,858 | ​ | $ | 421,798
Net loss |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (15,565) | ​ |  | — | ​ |  | (15,565)
Other comprehensive income (loss), net of tax |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 20 | ​ |  | 20
Share-based compensation expense |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 4,588 | ​ |  | — | ​ |  | — | ​ |  | 4,588
Net issuance under employee stock plans | ​ | 296 | ​ | ​ | 3 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 182 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 185
Balance at June 30, 2019 |  | 48,971 | ​ | $ | 490 | ​ | ​ | — | ​ | $ | — | ​ | $ | 1,062,949 | ​ | $ | (654,291) | ​ | $ | 1,878 | ​ | $ | 411,026
​ Accumulated Other Comprehensive Income (“AOCI”) ​ The following table presents the changes in the balances of each component of AOCI, net of tax: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Unrealized | ​ | ​ | ​
​ | ​ | ​ | ​ | Gains (Losses) | ​ | ​ | ​
​ | ​ | Foreign | ​ | on Available | ​ | ​ | ​
​ | ​ | Currency | ​ | for Sale | ​ | ​ | ​
​ |  | Translation |  | Securities |  | Total
​ | ​ | (in thousands)
Balance - December 31, 2019 | ​ | $ | 1,861 | ​ | $ | 33 | ​ | $ | 1,894
Other comprehensive income (loss) | ​ |  | (30) | ​ |  | 53 | ​ |  | 23
Balance - June 30, 2020 | ​ | $ | 1,831 | ​ | $ | 86 | ​ | $ | 1,917
​ There were minimal reclassifications from AOCI into net income for the three and six months ended June 30, 2020 and 2019.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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