Equity and Share-Based Compensation	3 Months Ended
Mar. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity and Share-Based Compensation	3. Equity and Share-Based Compensation During the first three months of 2021 and 2020, we recognized approximately $613,000 and $465,000, respectively, of share-based compensation expense. Total share-based compensation expense is reported in selling and operating expenses and corporate, general and administration expenses on our condensed consolidated statements of operations. During the first three months of 2021, no options were exercised. During the first three months of 2020, 24,000 options were exercised with net proceeds of $120,000.

The entire disclosure for shareholders' equity and share-based payment arrangement. Includes, but is not limited to, disclosure of policy and terms of share-based payment arrangement, deferred compensation arrangement, and employee stock purchase plan (ESPP).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

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