Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 30, 2017
Cash Flows From Operating Activities
Net loss	$ (33,316)	$ (11,378)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of leasehold improvements and equipment	607	510
Amortization of intangibles	235	206
Share-based compensation expense	6,371	4,605
Allowance for doubtful trade receivables	(132)	(411)
Gain from disposal of assets	0	(5,467)
Loss from disposal of equipment	1	5
Non-cash financing costs	70	121
Other Non-cash expense	65	0
Changes in operating assets and liabilities:
Trade receivables	1,111	937
Inventories	(2,453)	2,177
Prepaid expenses and other assets	65	(296)
Accounts payable	5,829	(2,364)
Accrued expenses	668	1,472
Customer deposits and other	69	(68)
Deferred rent	2	180
Due to officer	(100)	(33)
Net cash used in operating activities	(20,908)	(9,804)
Cash Flows From Investing Activities
Proceeds from disposal of assets, net of transaction costs	0	5,953
Purchases of leasehold improvements and equipment	(1,321)	(1,167)
Purchases of intangible assets	(131)	(184)
Investment in other long-term assets	(323)	0
Net cash provided by (used in) investing activities	(1,775)	4,602
Cash Flows From Financing Activities
Proceeds from issuance of common stock, net of issuance costs	0	46,594
Proceeds from exercise of stock options	529	3,038
Repurchase of common stock	(404)	0
Payment of debt issuance cost	(19)	(75)
Principal payments on capital leases	(196)	(608)
Net cash (used in) provided by financing activities	(90)	48,949
Net increase (decrease) in cash	(22,773)	43,747
Cash Beginning of Year	45,389	1,642
Cash Ending of Year, including restricted cash $0.2 million for 2018	22,616	45,389
Supplemental Disclosures of Cash Flow Information
Cash payments for interest	41	57
Supplemental Schedule of Noncash Operating Activity
Adjustment to retained earnings: cumulative effect of initially applying ASC 606	164,000	0
Supplemental Schedule of Noncash Investing Activity
Noncash consideration transferred for the acquisition of Healthspan Research LLC	0	1,187
Capital lease obligation incurred for purchases of equipment	0	515
Receivable from disposal of assets held at escrow	0	750
Retirement of fully depreciated equipment - cost	0	57
Retirement of fully depreciated equipment - accumulated depreciation	$ 0	$ (57)