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SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

This information has been prepared on a basis consistent with that of the audited consolidated financial statements. We believe that all necessary adjustments, consisting of normal recurring accruals and adjustments, have been included to present fairly the quarterly financial data. The results of historical periods are not necessarily indicative of the results of operations for any future period.

The table below summarizes the Company’s unaudited consolidated quarterly operating results for the year ended December 31, 2019:
 
For the Quarters Ended
 
March
 
June
 
September
 
December
 
(unaudited, in thousands, except per share data)
Collaboration revenue
$
3,492

 
$
2,573

 
$
1,183

 
$
669

Loss from operations
$
(4,593
)
 
$
(2,979
)
 
$
(6,055
)
 
$
(10,841
)
Net loss
$
(4,580
)
 
$
(3,654
)
 
$
(4,781
)
 
$
(10,862
)
Net income (loss) attributable to common stockholders
$
5,939

 
$
(3,817
)
 
$
(4,863
)
 
$
(10,862
)
Basic net income (loss) per common share attributable to common stockholders
$
10.08

 
$
(6.49
)
 
$
(1.65
)
 
$
(1.38
)
Diluted net loss per common share attributable to common stockholders
$
(2.48
)
 
$
(6.49
)
 
$
(1.65
)
 
$
(1.38
)

The table below summarizes the Company’s unaudited consolidated quarterly operating results for the year ended December 31, 2018:
 
For the Quarters Ended
 
March
 
June
 
September
 
December
 
(unaudited, in thousands, except per share data)
Collaboration revenue
$
5,000

 
$
373

 
$
3,042

 
$
2,473

Income (loss) from operations
$
764

 
$
(3,315
)
 
$
(2,299
)
 
$
(3,601
)
Net income (loss)
$
527

 
$
(3,552
)
 
$
(2,541
)
 
$
(3,670
)
Net loss attributable to common stockholders
$
(2,713
)
 
$
(4,417
)
 
$
(3,507
)
 
$
(4,535
)
Basic and diluted net loss per common share attributable to common stockholders
$
(4.63
)
 
$
(7.53
)
 
$
(5.98
)
 
$
(7.72
)