Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation – The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”). The unaudited condensed consolidated financial statements include the accounts of the Company as well as the Company’s wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The interim unaudited condensed consolidated financial statements have been prepared on the same basis as the annual audited consolidated financial statements and in accordance with the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). In the opinion of management, the interim unaudited financial statements reflect all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of the Company’s financial position as of June 30, 2023, the results of its operations and changes to stockholders’ equity for the three and six months ended June 30, 2023 and 2022, and its cash flows for the six months ended June 30, 2023 and 2022. The results for the three and six months ended June 30, 2023, are not necessarily indicative of results to be expected for the year ending December 31, 2023, or any other interim periods, or any future year or period. All amounts included herein have been rounded except where otherwise stated. As figures are rounded, numbers presented throughout this document may not add up precisely to the totals we provide and percentages may not precisely reflect the absolute figures.

These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes in Item 8 of Part II, “Financial Statements and Supplementary Data,” of our Annual Report on Form 10-K for the year ended December 31, 2022.

Debt, Policy [Policy Text Block]

March 2023 Issuance of $402.5 million of 3.00% Convertible Senior Notes (the "Convertible Senior Notes") - In conjunction with the issuance of the $402.5 million Convertible Notes in March 2023, the Company evaluated the debt instrument and its embedded features to determine if the contract or the embedded components of the contract qualified as a derivative that would be required to be separately accounted for in accordance with the relevant accounting literature.

The Company accounts for its Convertible Senior Notes as a single liability measured at amortized cost. The Company uses the effective interest rate method to amortize the debt issuance costs to interest expense over the respective term of the Convertible Senior Notes.

Fair Value of Financial Instruments, Policy [Policy Text Block]

Fair Value of Financial Instruments – Financial Accounting Standards Board (“FASB”) ASC 820, Fair Value Measurements and Disclosure guidance specifies a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect market assumptions. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement).

The three levels of the fair value hierarchy are as follows:

	•	Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 1 primarily consists of financial instruments whose value is based on quoted market prices such as exchange-traded instruments and listed equities.
	•	Level 2 - Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly (e.g., quoted prices of similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in markets that are not active). Level 2 includes financial instruments that are valued using models or other valuation methodologies.
	•	Level 3 - Unobservable inputs for the asset or liability. Financial instruments are considered Level 3 when their fair values are determined using pricing models, discounted cash flows or similar techniques and at least one significant model assumption or input is unobservable.

Our financial assets and liabilities include cash and cash equivalents, short-term investments, receivables, accounts payable and accrued liabilities, the fair values of which approximate their carrying values due to the short-term nature of these instruments. The Company holds certain financial assets within cash & cash equivalents and short-term investments in the form of held-to-maturity treasury bills that are not carried at fair value on the Consolidated Balance Sheet. The fair value of these assets is based on quoted market prices for the same or similar securities within less active markets, which the Company determined to be Level 2 inputs. As of June 30, 2023, the fair value of these treasury bills approximates their carrying value due to the short-term nature of these instruments.

Certain financial and non-financial assets, including the equity method investment/investment in equity securities, operating lease right-of-use assets and property, plant and equipment are reported at their carrying values and are not subject to recurring fair value measurements. We review our long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable in accordance with ASC 360-10, Accounting for the Impairment or Disposal of Long-Lived Assets.

Refer to Note 6 for the fair value of our Convertible Senior Notes.

As of June 30, 2023, the Company maintained Level 1 and Level 2 assets and liabilities.

Investment, Policy [Policy Text Block]

Short-Term Investments – The Company holds treasury bills with original maturities when purchased of greater than three months, within short-term investments, carried at amortized cost on the Consolidated Balance Sheet. Treasury bills have been classified as held-to-maturity as we have the ability and intent to hold them to maturity. As of June 30, 2023, the Company had $114,437 of treasury bills within short-term investments, which included $996 of amortized discount, and will mature within the third quarter of 2023.

Implementation Costs of Cloud Computing Arrangement Policy [Policy Text Block]

Implementation Costs of Cloud Computing Arrangement – As of June 30, 2023 and December 31, 2022, the Company's deferred implementation costs of our new ERP system associated with our cloud computing arrangement, which were reflected within prepaid and other assets, were $8,678 and $9,444, respectively. The cost will be recognized over the term of the agreement, which began in the first quarter of 2022.

New Accounting Pronouncements, Policy [Policy Text Block]

Recently Adopted Accounting Standards

The Company did not adopt any new Accounting Standard Updates during the quarter ended June 30, 2023.