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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of changes in accumulated other comprehensive income (loss), by component | Changes in accumulated other comprehensive income (loss), by component, were as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  |  | Projected |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ | ​
​ | ​ | ​ | Pension and | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Postretirement Benefit | ​ | Translation | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Obligations | ​ | Adjustment | ​ | Other | ​ | Total |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2017 | ​ | ​ | $ | 3,127 | ​ | $ | 355 | ​ | $ | 264 | ​ | $ | 3,746 | ​
Unrecognized actuarial gain (loss), net of tax of $0.6 million | ​ | ​ |  | (840) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (840) | ​
Foreign currency translation adjustment | ​ | ​ |  | — | ​ | ​ | (4,390) | ​ | ​ | — | ​ | ​ | (4,390) | ​
Adoption of ASU 2016-01 | ​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (203) | ​ | ​ | (203) | ​
Interest rate swap | ​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 78 | ​ | ​ | 78 | ​
Balance at December 31, 2018 | ​ | ​ | $ | 2,287 | ​ | $ | (4,035) | ​ | $ | 139 | ​ | $ | (1,609) | ​
Unrecognized actuarial gain (loss), net of tax of $0.1 million | ​ | ​ | ​ | (445) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (445) | ​
Foreign currency translation adjustment | ​ | ​ | ​ | — | ​ | ​ | (1,041) | ​ | ​ | — | ​ | ​ | (1,041) | ​
Interest rate swap | ​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (187) | ​ | ​ | (187) | ​
Balance at December 31, 2019 | ​ | ​ | ​ | 1,842 | ​ | ​ | (5,076) | ​ | ​ | (48) | ​ | ​ | (3,282) | ​
Unrecognized actuarial gain (loss), net of tax of $0.1 million | ​ | ​ | ​ | (2,412) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,412) | ​
Foreign currency translation adjustment | ​ | ​ | ​ | — | ​ | ​ | 37 | ​ | ​ | — | ​ | ​ | 37 | ​
Interest rate swap | ​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (101) | ​ | ​ | (101) | ​
Reclassification of foreign currency losses on assets held for sale | ​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,036 | ​ | ​ | 6,036 | ​
Balance at December 31, 2020 | ​ | ​ | $ | (570) | ​ | $ | (5,039) | ​ | $ | 5,887 | ​ | $ | 278 | ​
​
Schedule of assets and liabilities of the Company measured at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | Significant Other
​ | ​ | Quoted Prices in | ​ | Observable | ​ | Unobservable | ​ | ​ | ​
​ | ​ | Active Markets | ​ | Inputs | ​ | Inputs | ​ | ​ | ​
Description | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3) | ​ | Total
Certificates of deposit | ​ | $ | — | ​ | $ | 380 | ​ | $ | — | ​ | $ | 380
Money market funds | ​ | ​ | 2,785 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,785
Other investments | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 13,357 | ​ | ​ | 13,357
Interest rate swap | ​ | ​ | — | ​ | ​ | (157) | ​ | ​ | — | ​ | ​ | (157)
Total assets and liabilities measured at fair value | ​ | $ | 2,785 | ​ | $ | 223 | ​ | $ | 13,357 | ​ | $ | 16,365
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 | ​
| ​ | Significant Other | ​
​ | ​ | Quoted Prices in | ​ | Observable | ​ | Unobservable | ​ | ​ | ​ | ​
​ | ​ | Active Markets | ​ | Inputs | ​ | Inputs | ​ | ​ | ​ | ​
Description | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3) | ​ | Total |
Certificates of deposit | ​ | $ | — | ​ | $ | 380 | ​ | $ | — | ​ | $ | 380 | ​
Money market funds | ​ | ​ | 2,329 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,329 | ​
Short term investments | ​ | ​ | 416 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 416 | ​
Other investments | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 12,700 | ​ | ​ | 12,700 | ​
Interest rate swap | ​ | ​ | — | ​ | ​ | (56) | ​ | ​ | — | ​ | ​ | (56) | ​
Total assets and liabilities measured at fair value | ​ | $ | 2,745 | ​ | $ | 324 | ​ | $ | 12,700 | ​ | $ | 15,769 | ​
Schedule of reconciliation from basic to diluted weighted average common shares outstanding | The reconciliation from basic to diluted weighted average shares of Common Stock outstanding is as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31, | ​
​ |  | 2020 |  | 2019 |  | 2018 |
Basic weighted-average shares of common stock outstanding |  | 15,923 | ​ | 15,983 | ​ | 15,988 | ​
Stock options |  | — | ​ | — | ​ | 54 | ​
Diluted weighted-average shares of common stock outstanding |  | 15,923 | ​ | 15,983 | ​ | 16,042 | ​

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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