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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Aug. 28, 2022
Aug. 29, 2021
Cash flows from operating activities:    
Net loss $ (11,351) $ (9,477)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation, amortization of intangibles, debt costs and right-of-use assets 4,356 5,054
Gain on sale of BreatheWay (2,108) 0
Stock-based compensation expense 785 620
Deferred taxes (17) (2,138)
Gain on disposal of property and equipment related to restructuring, net 0 (92)
Provision for expected credit losses 0 60
Net loss on disposal of property and equipment held and used 0 16
Other, net (18) (70)
Changes in current assets and current liabilities:    
Accounts receivable, net 7,238 7,997
Inventory 2,560 248
Prepaid expenses and other current assets (761) (2,697)
Accounts payable 581 1,517
Accrued compensation (2,865) (3,131)
Other accrued liabilities 183 2,838
Deferred revenue (116) 86
Net cash (used in) provided by operating activities (1,533) 831
Cash flows from investing activities:    
Proceeds from sale of BreatheWay, net 3,135 0
Purchases of property and equipment (2,929) (7,913)
Sale of Investment in non-public company 0 45,100
Proceeds from sales of property and equipment 0 1,082
Net cash provided by investing activities 206 38,269
Cash flows from financing activities:    
Payments on long-term debt (27) (41,388)
Proceeds from lines of credit 4,000 8,000
Payments on lines of credit 0 (5,000)
Taxes paid by Company for employee stock plans (67) (428)
Payments for debt issuance costs 0 (132)
Net cash provided by (used in) financing activities 3,906 (38,948)
Net increase in cash and cash equivalents 2,579 152
Cash and cash equivalents, beginning of period 1,643 1,295
Cash and cash equivalents, end of period 4,222 1,447
Supplemental disclosure of non-cash investing and financing activities:    
Purchases of property and equipment on trade vendor credit $ 2,243 $ 1,994