The Company accounted for the acquisitions of Unified Messaging Systems ASA, Respond B.V. and PlanetRisk, Inc. using the acquisition method of accounting for business combinations under ASC 805, Business Combinations. The total purchase price is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date.

On April 3, 2018, the Company acquired Unified Messaging Systems ASA, or UMS, in exchange for cash consideration of $31.9 million, net of cash acquired. UMS is an industry leader in the area of critical communication and population alerting systems and is headquartered in Oslo, Norway. The Company acquired UMS for its customer base and to complement some of the existing facets of the Company’s business with existing customers.

The following table summarizes the allocation of the purchase consideration and acquisition date fair values of the assets acquired and the liabilities assumed for the acquisition of UMS made by the Company. The following table also summarizes the aggregate consideration for UMS as of December 31, 2018 (in thousands):

	UMS
Assets acquired
Accounts receivable		3,793
Other assets		2,069
Property and equipment		27
Trade names		470
Acquired technology		930
Customer relationships		16,400
Goodwill		18,278
Total assets acquired	$	41,967
Liabilities assumed
Accounts payable and accrued expenses		3,852
Deferred revenue		6,130
Other liabilities		101
Net assets acquired	$	31,884
Consideration paid
Cash paid, net of cash acquired		31,884
Total	$	31,884

The weighted average useful life of all identified acquired intangible assets is 6.63 years. The weighted average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 7.0 years and 1.0 years, respectively. The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.

As a result of the acquisition, the Company recorded $18.3 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of UMS’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of UMS support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the UMS acquisition is not deductible for income tax purposes.

For the twelve months ended December 31, 2018, the Company incurred transaction costs of $0.4 million in connection with the UMS acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

On May 1, 2018, the Company acquired certain assets from PlanetRisk, Inc., or PlanetRisk, in exchange for cash consideration of $2.0 million. PlanetRisk is a provider of data analytics and visualization solutions. The Company acquired these assets from PlanetRisk for its customer base and to complement some of the existing facets of the Company’s business with existing products.

The following table summarizes the allocation of the purchase consideration and acquisition date fair values of the assets acquired and the liabilities assumed for the acquisition of PlanetRisk made by the Company. The following table also summarizes the aggregate consideration for PlanetRisk as of December 31, 2018 (in thousands):

	PlanetRisk
Assets acquired
Accounts receivable		2,862
Property and equipment		488
Acquired technology		110
Customer relationships		2,300
Goodwill		228
Total assets acquired	$	5,988
Liabilities assumed
Accounts payable and accrued expenses		717
Deferred revenue		3,030
Other liabilities		220
Net assets acquired	$	2,021
Consideration paid
Cash paid, net of cash acquired		2,021
Total	$	2,021

The weighted average useful life of all identified acquired intangible assets is 6.825 years. The weighted average useful lives for acquired technologies and customer relationships are 3.0 years and 7.0 years, respectively. The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.

As a result of the acquisition, the Company recorded $0.2 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of PlanetRisk’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of PlanetRisk support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the PlanetRisk acquisition is deductible for income tax purposes.

For the twelve months ended December 31, 2018, the Company incurred transaction costs of $0.1 million in connection with the PlanetRisk acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

On May 18, 2018, the Company acquired Respond B.V., or Respond, in exchange for current cash consideration of $2.0 million, net of cash acquired and issued a note to be paid one year after the transaction date in the amount of $0.4 million, for a total purchase price of $2.3 million. Respond is a provider of critical communication solutions and is headquartered in the Netherlands. The Company acquired Respond for its customer base and to complement some of the existing facets of the Company’s business with its existing customers.

The following table summarizes the allocation of the purchase consideration and acquisition date fair values of the assets acquired and the liabilities assumed for the acquisition of Respond made by the Company. The following table also summarizes the aggregate consideration for Respond as of December 31, 2018 (in thousands):

	Respond
Assets acquired
Accounts receivable		86
Other assets		87
Property and equipment		19
Trade names		90
Acquired technology		140
Customer relationships		1,600
Goodwill		1,193
Total assets acquired	$	3,215
Liabilities assumed
Accounts payable and accrued expenses		226
Deferred revenue		240
Other liabilities		414
Net assets acquired	$	2,335
Consideration paid
Cash paid, net of cash acquired		1,952
Note payable		383
Total	$	2,335

The weighted average useful life of all identified acquired intangible assets is 6.40 years. The weighted average useful lives for acquired technologies, customer relationships and trade names are 3.0 years, 7.0 years and 1.0 years, respectively. The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.

As a result of the acquisition, the Company recorded $1.2 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of Respond’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of Respond support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the Respond acquisition is not deductible for income tax purposes.

For the twelve months ended December 31, 2018, the Company incurred transaction costs of $0.1 million in connection with the Respond acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

Neither the investment in the assets nor the results of operations of the three combined acquisitions were significant to the Company’s consolidated financial position or results of operations, and thus pro forma information is not presented.

On January 27, 2017, the Company acquired IDV, in exchange for current cash consideration of $21.2 million, net of cash acquired and the fair value of contingent future consideration. At the date of acquisition, $2.5 million was deposited in an escrow account for fifteen months. The escrow fund is available to provide security to the Company to compensate it for losses it may incur as a result of any inaccuracy in the representations or warranties of IDV or the sellers contained in the IDV purchase agreement, any failure to comply with any covenant contained in the IDV purchase agreement or any liabilities or obligations related to the operation of IDV’s business prior to the closing of the acquisition.

In addition, in order to earn any future contingent consideration, IDV is required to meet certain billings thresholds at June 30, 2017 and December 31, 2017. At the date of the acquisition, the Company assessed the probabilities of IDV meeting the future sales and billing thresholds and determined them to be probable. Therefore, contingent consideration was recorded as part of the purchase price allocation and the fair value of the contingent consideration was determined to be $5.0 million. Based on sales and billings thresholds met as of June 30, 2017, the Company paid $3.8 million of the contingent consideration and all outstanding contingencies have been resolved as of December 31, 2018. IDV is a provider of threat assessment and operational visualization software located in Lansing, Michigan. The Company acquired IDV for its customer base and to complement some of the existing facets of its business with the Company’s existing customers.

The following table summarizes the allocation of the purchase consideration and the estimated fair value of the assets acquired and the liabilities assumed for the acquisition of IDV made by the Company. The following table also summarizes the aggregate consideration for IDV as of December 31, 2017 (in thousands):

Assets acquired	IDV
Accounts receivable	$	1,462
Other assets		242
Property and equipment		174
Trade names		1,590
Acquired technology		2,490
Customer relationships		3,400
Non-compete arrangement		240
Goodwill		21,196
Total assets acquired	$	30,794
Liabilities assumed
Accounts payable and accrued expenses	$	347
Deferred revenue		4,060
Other liabilities		132
Net assets acquired	$	26,255
Consideration paid
Cash paid, net of cash acquired	$	21,235
Acquisition date fair value of contingent consideration		5,020
Total	$	26,255

The weighted average useful life of all identified acquired intangible assets is 4.26 years. The weighted average useful lives for acquired technologies, customer relationships, non-compete arrangements and trade names are 3.0 years 5.0 years, 2.0 years and 5.0 years, respectively. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method and the estimated useful lives of two to five years. The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.

As a result of the acquisition, the Company recorded $21.2 million of goodwill. The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of IDV’s products with the Company's other solutions. The Company believes that the factors listed above in relation to the purchase of IDV support the amount of goodwill recorded as a result of the purchase price paid for the acquisition, in relation to other acquired tangible and intangible assets. The resulting goodwill from the IDV acquisition is deductible for income tax purposes.

For the year ended December 31, 2017, the Company incurred transaction costs of $0.1 million in connection with the IDV acquisition, which were expensed as incurred and included in general and administrative expenses within the accompanying consolidated statements of operations.

The following tables reflect the unaudited pro forma combined results of operations for the year ended December 31, 2017 as if the acquisition of IDV had taken place on January 1, 2017. The unaudited pro forma financial information includes the effects of certain adjustments, including the amortization of acquired intangible assets and the associated tax effect and the elimination of the Company’s and the acquiree’s non-recurring acquisition related expenses:

Revenue

Net loss

Results of acquired business included in our twelve months

ended (in thousands):

For the year ended December 31, 2017 pro forma

104,889

(19,779

)

	Year Ended December 31,
	2017
Basic and diluted earnings per share pro forma	$	(0.71	)

The unaudited pro forma information presented does not purport to be indicative of the results that would have been achieved had the acquisition been consummated at January 1, 2017 nor of the results which may occur in the future. The pro forma adjustments are based upon available information and certain assumptions that the Company believes are reasonable.