Summary of Significant Accounting Policies - (Tables)

3 Months Ended

Mar. 31, 2020

Summary of Significant Accounting Policies

Components of Inventory

	March 31,		December 31,
	2020		2019
Raw materials	$	200	$	217
Work-in-process		118		148
Finished goods		789		589
	$	1,107	$	954

Reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheet to the total amounts shown in the statement of cash flows

	March 31,		March 31,		December 31,		December 31,
	2020		2019		2019		2018
Cash and cash equivalents	$	48,152	$	76,251	$	54,437	$	54,062
Restricted cash		1,764		6,614		1,764		6,614
Total cash, cash equivalents and restricted cash as shown on the statements of cash flows	$	49,916	$	82,865	$	56,201	$	60,676