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Quarterly Consolidated Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2017
Quarterly Financial Data [Abstract]  
Schedule of unaudited quarterly consolidated financial information
 
Quarter Ended
 
March 31,
2017
 
June 30,
2017
 
September 30,
2017
 
December 31,
2017 (b)
 
(dollars in thousands, except share and per share data)
Net sales
$
98

 
$
2,314

 
$
5,008

 
$
9,400

Cost of goods sold
1,626

 
1,643

 
1,722

 
3,820

Gross profit
(1,528
)
 
671

 
3,286

 
5,580

 
 
 
 
 
 
 
 
Costs and Expenses:
 
 
 
 
 
 
 
Research and development
18,411

 
22,069

 
5,876

 
1,990

Selling, general and administrative
42,788

 
52,185

 
45,110

 
41,779

Loss from Operations
(62,727
)
 
(73,583
)
 
(47,700
)
 
(38,189
)
Other Loss:
 
 
 
 
 
 
 
Interest expense, net
(790
)
 
(345
)
 
(1,226
)
 
(2,909
)
Debt conversion expense
(1,209
)
 
—

 
—

 
—

Change in fair value of derivative instruments—warrants
122

 
39

 
55

 
4,124

Total Other Loss
(1,877
)
 
(306
)
 
(1,171
)
 
1,215

Net loss
$
(64,604
)
 
$
(73,889
)
 
$
(48,871
)
 
$
(36,974
)
 
 
 
 
 
 
 
 
Weighted Average Common Shares Outstanding—basic and diluted (a)
215,484,670

 
224,948,622

 
224,954,941

 
235,924,350

 
 
 
 
 
 
 
 
Net Loss per Common Share—basic and diluted (a)
$
(0.30
)
 
$
(0.33
)
 
$
(0.22
)
 
$
(0.16
)

_____________________________________________________________________________
(a)
Basic and diluted EPS are computed independently for each of the periods presented. Accordingly, the sum of the quarterly EPS amounts may not agree to the total for the year.
(b)
Net sales for the quarter ended December 31, 2017 includes $2.2 million of revenue recognized as a result of our ability to make a reasonable estimate for the right of return.

 
Quarter Ended
 
March 31,
2016
 
June 30,
2016
 
September 30,
2016
 
December 31,
2016
 
(dollars in thousands, except share and per share data)
Net sales
$
—

 
$
—

 
$
—

 
$
—

 
 
 
 
 
 
 
 
Costs and Expenses:
 
 
 
 
 
 
 
Research and development
20,679

 
25,906

 
24,065

 
16,406

Selling, general and administrative
6,871

 
10,954

 
14,417

 
25,992

Loss from Operations
(27,550
)
 
(36,860
)
 
(38,482
)
 
(42,398
)
 
 
 
 
 
 
 
 
Other Loss:
 
 
 
 
 
 
 
Interest expense, net
(7,036
)
 
(1,673
)
 
(1,674
)
 
(3,007
)
Debt conversion expense
(25,615
)
 
—

 
—

 
(14,543
)
Tax credits
—

 
—

 
—

 
126

Change in fair value of derivative instruments—warrants
260

 
(23
)
 
(87
)
 
(45
)
Total Other Loss
(32,391
)
 
(1,696
)
 
(1,761
)
 
(17,469
)
Net Loss
$
(59,941
)
 
$
(38,556
)
 
$
(40,243
)
 
$
(59,867
)
 
 
 
 
 
 
 
 
Weighted Average Common Shares Outstanding—basic and diluted (a)
117,626,669

 
168,127,144

 
179,786,580

 
190,093,786

 
 
 
 
 
 
 
 
Net Loss per Common Share—basic and diluted (a)
$
(0.51
)
 
$
(0.23
)
 
$
(0.22
)
 
$
(0.31
)

____________________________________________________________________________
(a)
Basic and diluted EPS are computed independently for each of the periods presented. Accordingly, the sum of the quarterly EPS amounts may not agree to the total for the year.