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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 9,074 $ 9,492
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 1,572 778
Non-cash reserve charges (238) 185
Stock-based compensation 2,681 820
Non-cash lease expense 2  
Provision for deferred income taxes (54) 212
Change in operating assets and liabilities:    
Accounts receivable (8,004) (3,042)
Prepaid and other assets (724) 255
Accounts payable and other accrued expenses 3,773 785
Inventory (7,323) (2,360)
Deposits (18) (15)
Other 77 (807)
Net cash provided by operating activities 818 6,303
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of property and equipment (985) (160)
Net cash used in investing activities (985) (160)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Payments on finance lease obligations (57) (19)
Common stock cash dividends   (2,262)
Purchase of treasury stock   (171)
Proceeds from issuance of common stock under equity offering, net 25,203  
Proceeds from the issuance of common stock on stock-based awards 566 221
Taxes withheld and paid on employees' equity awards (412)  
Net cash (used in) provided by financing activities 25,300 (2,231)
Net increase in cash and cash equivalents 25,133 3,912
Cash and cash equivalents at beginning of period 14,040 10,128
Cash and cash equivalents at end of period 39,173 14,040
Supplemental disclosure of cash flow information:    
Cash paid for interest (19) (5)
Cash paid for rent (1,633) (956)
Cash paid for income taxes (894) (2,873)
Supplemental disclosure of non-cash investing and financing activities:    
Right-of-use assets obtained in exchange for new operating lease liabilities 3,834 1,605
Right-of-use assets obtained in exchange for new finance lease liabilities 225 186
Inventory transferred to sales rep demos 519  
Inventory transferred to property and equipment under lease $ 811 $ 652