Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Cash flows from operating activities
Net loss	$ (10,796,000)	$ (4,704,000)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	125,000	126,000
Impairment of long-lived assets	2,870,000		$ 0
Stock-based compensation expense	717,000	1,048,000
Write-off lease receivable/prepaid commission assets	1,383,000
Changes in assets and liabilities
Prepaid expenses and other assets	1,188,000	(853,000)
Accounts payable	110,000	942,000
Deferred revenue		908,000
Accrued and other liabilities	(59,000)	1,137,000
Net cash used in operating activities	(4,462,000)	(1,396,000)
Cash flows from financing activities
Proceeds from issuance of common stock in connection with employee benefit plans	33,000
Net cash provided by financing activities	33,000
Net change in cash, cash equivalents, and restricted cash	(4,429,000)	(1,396,000)
Cash, cash equivalents, and restricted cash at beginning of period	67,557,000	59,388,000	59,388,000
Cash, cash equivalents, and restricted cash at end of period	$ 63,128,000	$ 57,992,000	$ 67,557,000