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Supplemental Data (Unaudited)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Supplemental Data (Unaudited)
NOTE 21. SUPPLEMENTAL DATA (UNAUDITED)

The following is a summary of unaudited selected quarterly financial information for the three months ended 2019 (in thousands, except per share data):
 
December 31,
September 30,
June 30,
March 31,
Revenue
$
3,470

$
2,271

$
1,806

$
1,750

Gross profit
$
1,513

$
1,154

$
899

$
834

Loss from operations
$
(18,269
)
$
(17,653
)
$
(18,087
)
$
(18,822
)
Net loss
$
(21,335
)
$
(20,434
)
$
(20,815
)
$
(21,721
)
Basic and diluted net loss per share
$
(0.40
)
$
(0.37
)
$
(0.38
)
$
(0.40
)

The following is a summary of unaudited selected quarterly financial information for the three months ended 2018 (in thousands, except per share data):

 
December 31,
September 30,
June 30,
March 31,
Revenue
$
1,822

$
1,355

$
1,692

$
801

Gross profit
$
524

$
675

$
975

$
309

Loss from operations
$
(19,759
)
$
(19,369
)
$
(20,415
)
$
(20,826
)
Net loss
$
(22,191
)
$
(22,098
)
$
(23,225
)
$
(20,812
)
Basic and diluted net loss per share
$
(0.41
)
$
(0.41
)
$
(0.43
)
$
(0.37
)