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Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | ---
Balances at Dec. 31, 2017 | $ 319,913 | $ 264 | $ 399,510 | $ (79,861)
Balances (in shares) at Dec. 31, 2017 |  | 26,413,000 |  |
Share-based compensation | 1,844 |  | 1,844 |
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) | 3,930 |  |  | 3,930
Balances at Mar. 31, 2018 | 351,295 | $ 274 | 426,952 | (75,931)
Balances (in shares) at Mar. 31, 2018 |  | 27,388,000 |  |
Balances at Dec. 31, 2018 | 315,152 | $ 268 | 435,245 | (120,361)
Balances (in shares) at Dec. 31, 2018 |  | 26,779,000 |  |
Cumulative effect, change in accounting for leases, net of tax (ASU 842 [Member]) at Dec. 31, 2018 | (12,272) |  |  | (12,272)
Issuance of common stock related to business combination | $ 16,608 | $ 9 | 16,599 |
Issuance of common stock related to business combination (In Shares) |  | 911,000 |  |
Proceeds from issuance of stock on options exercised (in shares) | 2,500 | 53,000 |  |
Share-based compensation | $ 4,140 |  | 4,140 |
Tax benefit from share-based compensation | (288) |  | (288) |
Net income (loss) | (8,018) |  |  | (8,018)
Balances at Mar. 31, 2019 | $ 315,322 | $ 277 | $ 455,696 | $ (140,651)
Balances (in shares) at Mar. 31, 2019 |  | 27,743,000 |  |

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