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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common stock | Additional Paid-in Capital | Accumulated Deficit | Treasury Stock
--- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Effect of adoption of topic 606 | Effect of adoption of topic 606 | $ 2,131 |  |  | $ 2,131 | $ 0
Beginning balance, shares outstanding at Dec. 31, 2017 |  | 16,098,000 |  |  |
Beginning balance, shares outstanding (Effect of adoption of topic 606) at Dec. 31, 2017 |  | 16,098,000 |  |  |
Beginning Balance at Dec. 31, 2017 | 197,656 | $ 226 | $ 216,158 | 57,904 | (76,632)
Beginning Balance (Effect of adoption of topic 606) at Dec. 31, 2017 | 199,787 | $ 226 | 216,158 | 60,035 | (76,632)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 9,356 |  |  | 9,356 |
Isuuance of common stock, shares |  | 91,000 |  |  |
Issuance of shares | 308 | $ 1 | 307 |  |
Exercise of stock options, shares |  | 112,000 |  |  |
Exercise of stock options | 320 | $ 1 | 319 |  |
Cancellation and retirement of restricted common stock, shares |  | (15,000) |  |  |
Cancellation and retirement of restricted common stock and stock options | (296) | $ 0 | (296) |  |
Stock-based compensation expense | 1,100 |  | 1,100 |  |
Dividends on common stock | (1,207) |  | (1,207) |  |
Other, shares |  | 6,000 |  |  |
Other | 145 |  | 145 |  |
Ending balance, shares outstanding at Mar. 31, 2018 |  | 16,292,000 |  |  |
Ending Balance at Mar. 31, 2018 | 209,513 | $ 228 | 216,526 | 69,391 | (76,632)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 2,747 |  |  | 2,747 |
Isuuance of common stock, shares |  | 13,000 |  |  |
Issuance of shares | 220 |  | 220 |  |
Exercise of stock options, shares |  | 27,000 |  |  |
Exercise of stock options | (196) | $ 1 | (197) |  |
Cancellation and retirement of restricted common stock, shares |  | (2,000) |  |  |
Cancellation and retirement of restricted common stock and stock options | (4) |  | (4) |  |
Stock-based compensation expense | 909 |  | 909 |  |
Dividends on common stock | (1,433) |  | (1,433) |  |
Convertible notes exchange, shares |  | 2,823,000 |  |  |
Convertible notes exchange | 28,222 | $ 28 | 28,194 |  |
Ending balance, shares outstanding at Jun. 30, 2018 |  | 19,153,000 |  |  |
Ending Balance at Jun. 30, 2018 | 239,978 | $ 257 | 244,215 | 72,138 | (76,632)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 2,200 |  |  | 2,200 |
Isuuance of common stock, shares |  | 24,000 |  |  |
Issuance of shares | 229 |  | 229 |  |
Cancellation and retirement of restricted common stock, shares |  | (2,000) |  |  |
Cancellation and retirement of restricted common stock and stock options | (156) |  | (156) |  |
Stock-based compensation expense | 915 |  | 915 |  |
Dividends on common stock | (1,436) |  | (1,436) |  |
Convertible notes exchange, shares |  | 0 |  |  |
Convertible notes exchange | 102 | $ 0 | 102 |  |
Ending balance, shares outstanding at Sep. 30, 2018 |  | 19,175,000 |  |  |
Ending Balance at Sep. 30, 2018 | 241,832 | $ 257 | 243,869 | 74,338 | (76,632)
Beginning balance, shares outstanding at Dec. 31, 2018 |  | 18,078,000 |  |  |
Beginning Balance at Dec. 31, 2018 | 221,492 | $ 257 | 243,849 | 71,680 | (94,294)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 6,525 |  |  | 6,525 |
Isuuance of common stock, shares |  | 48,000 |  |  |
Issuance of shares | 275 | $ 0 | 275 |  |
Exercise of stock options, shares |  | 71,000 |  |  |
Exercise of stock options | 472 | $ 1 | 471 |  |
Cancellation and retirement of restricted common stock, shares |  | (9,000) |  |  |
Cancellation and retirement of restricted common stock and stock options | (174) | $ 0 | (174) |  |
Stock-based compensation expense | 585 |  | 585 |  |
Dividends on common stock | (1,360) |  | (1,360) |  |
Other, shares |  | 15,000 |  |  |
Other | 294 |  | 294 |  |
Ending balance, shares outstanding at Mar. 31, 2019 |  | 18,203,000 |  |  |
Ending Balance at Mar. 31, 2019 | 228,109 | $ 258 | 243,940 | 78,205 | (94,294)
Beginning balance, shares outstanding at Dec. 31, 2018 |  | 18,078,000 |  |  |
Beginning Balance at Dec. 31, 2018 | $ 221,492 | $ 257 | 243,849 | 71,680 | (94,294)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Treasury stock acquired, shares | (400,000) |  |  |  |
Ending balance, shares outstanding at Sep. 30, 2019 |  | 17,826,000 |  |  |
Ending Balance at Sep. 30, 2019 | $ 224,510 | $ 259 | 242,657 | 83,644 | (102,050)
Beginning balance, shares outstanding at Mar. 31, 2019 |  | 18,203,000 |  |  |
Beginning Balance at Mar. 31, 2019 | 228,109 | $ 258 | 243,940 | 78,205 | (94,294)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 4,862 |  |  | 4,862 |
Isuuance of common stock, shares |  | 17,000 |  |  |
Issuance of shares | 197 |  | 197 |  |
Cancellation and retirement of restricted common stock, shares |  | (8,000) |  |  |
Cancellation and retirement of restricted common stock and stock options | (5) |  | (5) |  |
Stock-based compensation expense | 518 |  | 518 |  |
Dividends on common stock | (1,365) |  | (1,365) |  |
Treasury stock acquired, shares |  | (400,000) |  |  |
Treasury stock acquired | (7,756) |  |  |  | (7,756)
Ending balance, shares outstanding at Jun. 30, 2019 |  | 17,812,000 |  |  |
Ending Balance at Jun. 30, 2019 | 224,560 | $ 258 | 243,285 | 83,067 | (102,050)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 577 |  |  | 577 |
Isuuance of common stock, shares |  | 18,000 |  |  |
Issuance of shares | 212 | $ 1 | 211 |  |
Cancellation and retirement of restricted common stock, shares |  | (4,000) |  |  |
Cancellation and retirement of restricted common stock and stock options | (16) |  | (16) |  |
Stock-based compensation expense | 513 |  | 513 |  |
Dividends on common stock | (1,336) |  | (1,336) |  |
Ending balance, shares outstanding at Sep. 30, 2019 |  | 17,826,000 |  |  |
Ending Balance at Sep. 30, 2019 | $ 224,510 | $ 259 | $ 242,657 | $ 83,644 | $ (102,050)

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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683 + Details
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