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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | ---
Balances at Dec. 31, 2016 | $ 209,426 | $ 223 | $ 290,157 | $ (80,954)
Balances (in shares) at Dec. 31, 2016 |  | 22,232,000 |  |
Proceeds from issuance of stock on options exercised | 169 | $ 1 | 168 |
Proceeds from issuance of stock on options exercised (in shares) |  | 135,000 |  |
Share-based compensation | 8,754 |  | 8,754 |
Tax benefit from share-based compensation | (1,015) |  | (1,015) |
Share issuance related to business combination | 101,486 | $ 40 | 101,446 |
Share issuance related to business combination (In Shares) |  | 4,046,000 |  |
Cumulative effect, change in accounting for revenue recognition related to business combination | (991) |  |  | (991)
Net income (loss) | 2,084 |  |  | 2,084
Balances at Dec. 31, 2017 | 319,913 | $ 264 | 399,510 | (79,861)
Balances (in shares) at Dec. 31, 2017 |  | 26,413,000 |  |
Proceeds from issuance of stock on options exercised | 1,322 | $ 6 | 1,316 |
Proceeds from issuance of stock on options exercised (in shares) |  | 610,000 |  |
Share-based compensation | 9,641 |  | 9,641 |
Repurchases of common stock | $ (19,598) | $ (12) |  | (19,586)
Repurchases of common stock (in shares) | (1,200,000) | (1,219,000) |  |
Tax benefit from share-based compensation | $ (820) |  | (820) |
Issuance of common stock, net of offering costs | 25,608 | $ 10 | 25,598 |
Issuance of common stock, net of offering costs (in shares) |  | 975,000 |  |
Net income (loss) | (20,914) |  |  | (20,914)
Balances at Dec. 31, 2018 | 315,152 | $ 268 | 435,245 | (120,361)
Balances (in shares) at Dec. 31, 2018 |  | 26,779,000 |  |
Cumulative effect of change in accounting for leases, net of tax (ASU 842 [Member]) at Dec. 31, 2018 | $ (12,272) |  |  | (12,272)
Proceeds from issuance of stock on options exercised (in shares) | 271,984 |  |  |
Share-based compensation | $ 10,045 |  | 10,045 |
Repurchases of common stock |  |  |  | (19,600)
Repurchases of common stock (in shares) | 0 |  |  |
Tax benefit from share-based compensation | $ (301) |  | (301) |
Share issuance related to business combination | 16,608 | $ 9 | 16,599 |
Share issuance related to business combination (In Shares) |  | 911,000 |  |
Issuance of common stock, net of offering costs | 57 | $ 2 | 55 |
Issuance of common stock, net of offering costs (in shares) |  | 189,000 |  |
Net income (loss) | (39,545) |  |  | (39,545)
Balances at Dec. 31, 2019 | $ 289,744 | $ 279 | $ 461,643 | $ (172,178)
Balances (in shares) at Dec. 31, 2019 |  | 27,879,000 |  |

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