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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2022
Income Taxes  
Summary of Significant components of the Company's deferred tax assets

​

​

​

​

​

​

​

​

​

​

December 31, 

​

    

2022

    

2021

Deferred tax assets

​

​

​

​

​

  

Net operating loss carryforwards

​

$

55,091

​

$

47,737

Research and development credits

​

 

623

​

 

623

Lease liability

​

​

387

​

​

—

Accrued expenses and other

​

 

4,425

​

 

1,356

Inventory reserve

​

 

372

​

 

171

Gross deferred tax asset

​

 

60,898

​

 

49,887

Deferred tax liabilities

​

​

​

​

​

​

Depreciation and amortization

​

 

(435)

​

 

(89)

Right of use asset

​

​

(302)

​

​

—

Gross deferred tax liability

​

 

(737)

​

​

(89)

Net deferred tax asset before valuation allowance

​

​

60,161

​

​

49,798

Valuation allowance

​

 

(60,161)

​

 

(49,798)

Net deferred tax asset

​

$

—

​

$

—

Schedule of Company's net operating loss (NOL) carryforwards

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​

​

​

​

December 31, 

​

    

2022

    

2021

NOL carryforwards

​

​

​

​

​

​

Federal

​

$

212,314

​

$

181,443

State

​

 

173,472

​

 

151,488

Schedule of reconciliation of income tax benefit

​

​

​

​

​

​

​

​

​

​

​

Year ended December 31, 

​

    

2022

    

2021

 

2020

​

Rate reconciliation

​

  

​

  

​

​

​

Federal tax benefit at statutory rate

 

(21.0)

%  

(21.0)

%

(21.0)

%

State rate, net of federal benefit

 

(3.1)

 

(3.5)

​

(4.2)

​

Permanent differences

 

0.6

 

0.2

​

0.6

​

Research and development

 

—

 

0.4

​

0.7

​

Change in valuation allowance

 

23.4

 

24.2

​

24.0

​

Other

 

0.1

 

(0.3)

​

(0.1)

​

Total tax provision

 

—

%  

—

%

—

%