Capitalization and Warrant Instruments (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Common Stock Shares Reserved for Future Issuance

The following shares, in thousands, of common stock were reserved for future issuance:

	December 31
	2019	2018
Stock-based compensation plans	30,054	16,096
Healios Warrants to purchase common stock	4,000	18,500
	34,054	34,596