Three Months Ended
December 31, 2014

Twelve Months Ended
December 31, 2014

(in thousands)

Deferred revenue, beginning of period

$                    33,647

$                       25,831

Deferred revenue, end of period

35,583

35,583

Net change

1,936

9,752

Revenue recognized during the period

17,862

62,968

Billings

19,798

72,720

Contractual backlog, end of period

-

-

Bookings

$                      19,798

$                        72,720

Three Months Ended

Twelve Months Ended

December 31,

December 31,

2015

2014

2015

2014

(in thousands)

Net loss

$(8,214)

$(3,907)

$(16,596)

$(24,855)

Total other (income) expense, net

(5)

8

(12)

63

Income tax provision

63

130

307

370

Depreciation and amortization

2,361

1,903

8,628

7,741

EBITDA

(5,795)

(1,866)

(7,673)

(16,681)

Share-based compensation

6,326

1,971

14,108

8,375

Asset impairment charge

1,070

-

1,070

-

Severance expense

1,771

-

1,771

1,488

Acquisition-related and other expenses*

503

320

909

764

Adjusted EBITDA

$  3,875

$    425

$  10,185

$  (6,054)

* In the three months ended December 31, 2015, acquisition-related and other expenses represented certain strategic, CEO transition and tax-related costs as well as a lease exit cost. In the twelve months ended December 31, 2015, acquisition-related and other expenses also included certain legal costs related to the previously disclosed CEO transition and securities litigation. In 2014, acquisition-related and other expenses represented acquisition, strategic transaction and certain tax-related costs.