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Business Combinations - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Nov. 01, 2021 | Feb. 17, 2021 | Jan. 15, 2021 | Dec. 11, 2020 | Oct. 28, 2020 | Jun. 22, 2020 | Jun. 01, 2020 | Mar. 02, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Feb. 09, 2020
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Liabilities: |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | $ 96,314 | $ 52,711 | $ 0
Adcole |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  |  |  |  |  | $ 32,640 |  |  |
Purchase consideration |  |  |  |  |  |  |  | 32,640 |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  |  |  | 156 |  |  |
Accounts receivable |  |  |  |  |  |  |  | 840 |  |  |
Contract assets |  |  |  |  |  |  |  | 1,427 |  |  |
Inventory |  |  |  |  |  |  |  | 212 |  |  |
Prepaid expenses and other current assets |  |  |  |  |  |  |  | 661 |  |  |
Property, plant and equipment |  |  |  |  |  |  |  | 444 |  |  |
Intangible assets |  |  |  |  |  |  |  | 9,690 |  |  |
Total assets |  |  |  |  |  |  |  | 13,430 |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  | 894 |  |  |
Accrued expenses |  |  |  |  |  |  |  | 644 |  |  |
Deferred revenue |  |  |  |  |  |  |  | 777 |  |  |
Total liabilities |  |  |  |  |  |  |  | 2,315 |  |  |
Fair value of net identifiable assets acquired |  |  |  |  |  |  |  | 11,115 |  |  |
Goodwill |  |  |  |  |  |  |  | $ 21,525 |  |  |
DSS |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  |  |  |  | $ 3,940 |  |  |  |
Equity issued |  |  |  |  |  |  | 1,000 |  |  |  |
Purchase consideration |  |  |  |  |  |  | 4,940 |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  |  | 1,071 |  |  |  |
Accounts receivable |  |  |  |  |  |  | 1,282 |  |  |  |
Contract assets |  |  |  |  |  |  | 107 |  |  |  |
Inventory |  |  |  |  |  |  | 39 |  |  |  |
Prepaid expenses and other current assets |  |  |  |  |  |  | 37 |  |  |  |
Property, plant and equipment |  |  |  |  |  |  | 710 |  |  |  |
Intangible assets |  |  |  |  |  |  | 850 |  |  |  |
Other non-current assets |  |  |  |  |  |  | 26 |  |  |  |
Total assets |  |  |  |  |  |  | 4,122 |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  | 284 |  |  |  |
Deferred revenue |  |  |  |  |  |  | 103 |  |  |  |
Current portion of long-term debt |  |  |  |  |  |  | 353 |  |  |  |
Other current liabilities |  |  |  |  |  |  | 1,178 |  |  |  |
Long-term debt |  |  |  |  |  |  | 705 |  |  |  |
Deferred tax liabilities |  |  |  |  |  |  | 458 |  |  |  |
Total liabilities |  |  |  |  |  |  | 3,081 |  |  |  |
Fair value of net identifiable assets acquired |  |  |  |  |  |  | 1,041 |  |  |  |
Goodwill |  |  |  |  |  |  | $ 3,899 |  | 3,900 |  |
MIS |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  |  |  | $ 42,177 |  |  |  |  |
Equity issued |  |  |  |  |  | 2,616 |  |  |  |  |
Contingent consideration |  |  |  |  |  | 600 |  |  |  |  |
Purchase consideration |  |  |  |  |  | 45,393 |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  | 13,559 |  |  |  |  |
Accounts receivable |  |  |  |  |  | 1,097 |  |  |  |  |
Contract assets |  |  |  |  |  | 665 |  |  |  |  |
Property, plant and equipment |  |  |  |  |  | 451 |  |  |  |  |
Intangible assets |  |  |  |  |  | 35,000 |  |  |  |  |
Other non-current assets |  |  |  |  |  | 676 |  |  |  |  |
Total assets |  |  |  |  |  | 51,448 |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  | 3,689 |  |  |  |  |
Deferred revenue |  |  |  |  |  | 7,128 |  |  |  |  |
Other current liabilities |  |  |  |  |  | 2,749 |  |  |  |  |
Deferred tax liabilities |  |  |  |  |  | 7,297 |  |  |  |  |
Total liabilities |  |  |  |  |  | 20,863 |  |  |  |  |
Fair value of net identifiable assets acquired |  |  |  |  |  | 30,585 |  |  |  |  |
Goodwill |  |  |  |  |  | $ 14,808 |  |  | 14,800 |  |
Roccor |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  |  | $ 14,999 |  |  |  |  |  |
Equity issued |  |  |  |  | 1,565 |  |  |  |  |  |
Contingent consideration |  |  |  |  | 657 |  |  |  |  |  |
Purchase consideration |  |  |  |  | 17,221 |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  | 6,161 |  |  |  |  |  |
Accounts receivable |  |  |  |  | 517 |  |  |  |  |  |
Contract assets |  |  |  |  | 1,797 |  |  |  |  |  |
Property, plant and equipment |  |  |  |  | 1,128 |  |  |  |  |  |
Intangible assets |  |  |  |  | 13,400 |  |  |  |  |  |
Other non-current assets |  |  |  |  | 361 |  |  |  |  |  |
Total assets |  |  |  |  | 23,364 |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  | 1,880 |  |  |  |  |  |
Deferred revenue |  |  |  |  | 3,240 |  |  |  |  |  |
Other current liabilities |  |  |  |  | 5,112 |  |  |  |  |  |
Deferred tax liabilities |  |  |  |  | 1,952 |  |  |  |  |  |
Total liabilities |  |  |  |  | 12,184 |  |  |  |  |  |
Fair value of net identifiable assets acquired |  |  |  |  | 11,180 |  |  |  |  |  |
Goodwill |  |  |  |  | $ 6,041 |  |  |  | 6,000 |  |
LoadPath |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  | $ 7,598 |  |  |  |  |  |  |
Equity issued |  |  |  | 800 |  |  |  |  |  |  |
Purchase consideration |  |  |  | 8,398 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  | 995 |  |  |  |  |  |  |
Accounts receivable |  |  |  | 1,208 |  |  |  |  |  |  |
Contract assets |  |  |  | 187 |  |  |  |  |  |  |
Prepaid expenses and other current assets |  |  |  | 2 |  |  |  |  |  |  |
Property, plant and equipment |  |  |  | 42 |  |  |  |  |  |  |
Intangible assets |  |  |  | 4,230 |  |  |  |  |  |  |
Total assets |  |  |  | 6,664 |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  | 334 |  |  |  |  |  |  |
Deferred revenue |  |  |  | 115 |  |  |  |  |  |  |
Other current liabilities |  |  |  | 1,203 |  |  |  |  |  |  |
Total liabilities |  |  |  | 1,652 |  |  |  |  |  |  |
Fair value of net identifiable assets acquired |  |  |  | 5,012 |  |  |  |  |  |  |
Goodwill |  |  |  | $ 3,386 |  |  |  |  | 3,400 |  |
Oakman |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  | $ 12,142 |  |  |  |  |  |  |  |
Equity issued |  |  | 2,110 |  |  |  |  |  |  |  |
Purchase consideration |  |  | 14,252 |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  | 1,279 |  |  |  |  |  |  |  |
Contract assets |  |  | 121 |  |  |  |  |  |  |  |
Inventory |  |  | 40 |  |  |  |  |  |  |  |
Prepaid expenses and other current assets |  |  | 50 |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | 493 |  |  |  |  |  |  |  |
Intangible assets |  |  | 7,980 |  |  |  |  |  |  |  |
Total assets |  |  | 9,963 |  |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  | 46 |  |  |  |  |  |  |  |
Accrued expenses |  |  | 2,022 |  |  |  |  |  |  |  |
Deferred revenue |  |  | 253 |  |  |  |  |  |  |  |
Other current liabilities |  |  | 45 |  |  |  |  |  |  |  |
Deferred tax liabilities |  |  | 2,128 |  |  |  |  |  |  |  |
Total liabilities |  |  | 4,494 |  |  |  |  |  |  |  |
Fair value of net identifiable assets acquired |  |  | 5,469 |  |  |  |  |  |  |  |
Goodwill |  |  | $ 8,783 |  |  |  |  |  |  |  |
DPSS |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid |  | $ 27,305 |  |  |  |  |  |  |  |  |
Purchase consideration |  | 27,305 |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash |  | 711 |  |  |  |  |  |  |  |  |
Accounts receivable |  | 1,270 |  |  |  |  |  |  |  |  |
Contract assets |  | 1,534 |  |  |  |  |  |  |  |  |
Inventory |  | 3 |  |  |  |  |  |  |  |  |
Prepaid expenses and other current assets |  | 53 |  |  |  |  |  |  |  |  |
Property, plant and equipment |  | 734 |  |  |  |  |  |  |  |  |
Intangible assets |  | 24,370 |  |  |  |  |  |  |  |  |
Other non-current assets |  | 48 |  |  |  |  |  |  |  |  |
Total assets |  | 28,723 |  |  |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  | 1,186 |  |  |  |  |  |  |  |  |
Accrued expenses |  | 1,282 |  |  |  |  |  |  |  |  |
Deferred revenue |  | 4,003 |  |  |  |  |  |  |  |  |
Other current liabilities |  | 63 |  |  |  |  |  |  |  |  |
Deferred tax liabilities |  | 6,138 |  |  |  |  |  |  |  |  |
Total liabilities |  | 12,672 |  |  |  |  |  |  |  |  |
Fair value of net identifiable assets acquired |  | 16,051 |  |  |  |  |  |  |  |  |
Goodwill |  | $ 11,254 |  |  |  |  |  |  | $ 11,300 |  |
Techshot |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Cash paid | $ 2,228 |  |  |  |  |  |  |  |  |  |
Equity issued | 38,493 |  |  |  |  |  |  |  |  |  |
Purchase consideration | 40,721 |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash | 406 |  |  |  |  |  |  |  |  |  |
Accounts receivable | 287 |  |  |  |  |  |  |  |  |  |
Contract assets | 926 |  |  |  |  |  |  |  |  |  |
Inventory | 120 |  |  |  |  |  |  |  |  |  |
Prepaid expenses and other current assets | 86 |  |  |  |  |  |  |  |  |  |
Property, plant and equipment | 14,818 |  |  |  |  |  |  |  |  |  |
Intangible assets | 4,120 |  |  |  |  |  |  |  |  |  |
Total assets | 20,763 |  |  |  |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accounts payable | 39 |  |  |  |  |  |  |  |  |  |
Accrued expenses | 293 |  |  |  |  |  |  |  |  |  |
Deferred revenue | 675 |  |  |  |  |  |  |  |  |  |
Other current liabilities | 35 |  |  |  |  |  |  |  |  |  |
Deferred tax liabilities | 5,521 |  |  |  |  |  |  |  |  |  |
Total liabilities | 6,563 |  |  |  |  |  |  |  |  |  |
Fair value of net identifiable assets acquired | 14,200 |  |  |  |  |  |  |  |  |  |
Goodwill | $ 26,521 |  |  |  |  |  |  |  |  |  |

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