Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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LIQUIDITY (Details) - USD ($) $ in Thousands, shares in Millions			3 Months Ended
	Apr. 01, 2022	Aug. 20, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Cash balances			$ 115,993		$ 115,293
Issuance of common stock, net			$ 15,556	$ 72,203
2020 Lincoln Park PA
Number of common stock issued			3.8
Issuance of common stock, net			$ 24,900
ATM Offering Agreement
Number of common stock issued			7.4	9.3
Issuance of common stock, net		$ 50,000	$ 15,600	$ 47,300
ATM Offering Agreement \| Subsequent Event
Number of common stock issued	4.4
Issuance of common stock, net	$ 9,000