STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019
Cash flows from operating activities
Net loss		$ (19,774)		$ (14,657)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation		1,309		2,639
Amortization of intangible assets		1,256		1,227
Non-cash operating lease cost		505		537
Provision for bad debts		22		(78)
Write-down of inventory		8
Loss on disposal of property and equipment		27
Stock-based compensation expense		9,045		102
Changes in operating assets and liabilities:
Accounts receivable, net		1,332		14
Prepaid and other current assets		(1,239)		(51)
Inventories		(8,697)		(4,773)
Accounts payable		910		127
Accrued liabilities		871		1,929
Other		634		395
Net cash used in operating activities		(13,791)		(12,589)
Cash flows from investing activities
Acquisition of intangibles				(1,700)
Purchase of property and equipment		(366)		(389)
Proceeds from sale of property and equipment		40
Net cash used in investing activities		(326)		(2,089)
Cash flows from financing activities
Contributions from PDL		2,366		3,826
Distributions to PDL		(1,862)		(31)
Proceeds from notes payable due to related party		12,400		13,225
Payment of contingent consideration				(1,071)
Sale of common stock to PDL		16,431
Capital contribution from PDL		20,666
Net cash provided by financing activities		50,001		15,949
Net increase in cash, cash equivalents and restricted cash		35,884		1,271
Cash, cash equivalents and restricted cash at beginning of the year	[1]	4,715	[2]	3,444
Cash, cash equivalents and restricted cash at end the year	[2]	40,599		4,715	[1]
Supplemental cash flow information
Cash paid for interest		478		473
Supplemental schedule of non-cash investing and financing activities
Transfer from Inventories to Equipment under lease, net		3,280		745
Phantom stock liability settled with common stock		783		$ 784
Modification of phantom stock-based awards		306
Common stock issued to extinguish Series A Preferred Stock		37,246
Common stock issued to extinguish note payable due to related party		$ 32,633

[1] Includes restricted cash of $100 as of December 31, 2019 and 2018, respectively

[2] Includes restricted cash of zero and $100 as of December 31, 2020 and 2019, respectively