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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
NET REVENUE    
Total net revenue $ 80,122 $ 45,472
COSTS OF REVENUE AND OPERATING EXPENSES    
Costs of revenue - devices and supplies 17,417 8,814
Sales and marketing 34,133 14,855
General and administrative 18,323 10,737
Total costs of revenue and operating expenses 69,873 34,406
Income from operations 10,249 11,066
Other income/ (expense)    
Deferred insurance reimbursement   880
Loss on disposal of non-controlling interest (77)  
Interest expense (19) (5)
Other income/ (expense), net (96) 875
Income from operations before income taxes 10,153 11,941
Income tax expense 1,079 2,449
Net Income $ 9,074 $ 9,492
Net income per share:    
Basic $ 0.27 $ 0.29
Diluted $ 0.26 $ 0.28
Weighted average basic shares outstanding 33,869 32,439
Weighted average diluted shares outstanding 34,943 33,963
Devices [Member]    
NET REVENUE    
Total net revenue $ 21,269 $ 10,713
Supplies [Member]    
NET REVENUE    
Total net revenue $ 58,853 $ 34,759