Description of Business and Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2013
Description of Business and Summary of Significant Accounting Policies  
Schedule of revenue from U.S., Canadian and all other international customers combined

The following table sets forth revenue from the U.S., Canadian and all other international customers combined (in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2012

 

2013

 

2012

 

2013

 

Revenue-United States

 

$

17,845

 

$

22,264

 

$

51,347

 

$

61,430

 

Revenue-Canada

 

3,344

 

3,641

 

9,184

 

10,690

 

Revenue-all other international sources

 

7,416

 

7,736

 

18,316

 

20,635

 

Total revenue

 

$

28,605

 

$

33,641

 

$

78,847

 

$

92,755

 

 

 

 

 

 

 

 

 

 

 

International revenue (excluding Canada) as a percent of total revenue

 

26

%

23

%

23

%

22

%

Schedule of changes in the product warranty liability

The following table presents the changes in the product warranty liability (in thousands):

 

 

 

Warranty Liability

 

Balance at December 31, 2012

 

$

1,155

 

Warranty costs accrued

 

420

 

Warranty claims

 

(414

)

Balance at September 30, 2013

 

$

1,161

 

Schedule of reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share

The following table presents the reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share (in thousands):

 

 

 

Three Months Ended

 

Nine Months Ended

 

 

 

September 30,

 

September 30,

 

 

 

2012

 

2013

 

2012

 

2013

 

Numerator:

 

 

 

 

 

 

 

 

 

Net income (loss)

 

$

(4,092

)

$

1,731

 

$

(6,256

)

$

1,233

 

Denominator:

 

 

 

 

 

 

 

 

 

Weighted average common stock outstanding for basic net income (loss) per common share

 

2,363

 

14,389

 

2,324

 

6,511

 

Effect of dilutive securities—stock options, convertible preferred stock, and warrants to purchase common stock and preferred stock

 

 

9,167

 

 

14,695

 

Weighted average common shares and dilutive securities outstanding

 

2,363

 

23,556

 

2,324

 

21,206

 

Schedule of anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income (loss) per share

The following weighted-average common stock equivalents were anti-dilutive and therefore were excluded from the calculation of diluted net income (loss) per share (in thousands):

 

 

 

Three Months Ended

 

Nine Months Ended

 

 

 

September 30,

 

September 30,

 

 

 

2012

 

2013

 

2012

 

2013

 

Convertible preferred stock

 

15,294

 

 

15,294

 

 

Options to purchase common stock

 

4,366

 

253

 

4,312

 

355

 

Warrants to purchase common stock

 

541

 

 

541

 

 

Warrants to purchase preferred stock

 

194

 

 

194

 

1

 

Total

 

20,395

 

253

 

20,341

 

356