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ACQUISITIONS (Tables) | 12 Months Ended
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Dec. 31, 2021
TEGAM, Inc. [Member] |
Business Acquisition [Line Items] |
Schedule of components of fair value of total consideration transferred | ​
​ | ​ | ​ | ​
Cash paid for acquisition |  | $ | 15,430
Holdback | ​ | ​ | 1,800
Total fair value of consideration transferred | ​ | ​ | 17,230
Less cash acquired | ​ | ​ | (177)
Total purchase price | ​ | $ | 17,053
Schedule of fair value of assets acquired and liabilities assumed | ​
​ | ​ | ​ | ​
​ |  | Preliminary Fair Value
Current assets and liabilities, net | ​ | $ | 3,536
Property and equipment | ​ | ​ | 734
Operating lease right-of-use assets | ​ | ​ | 425
Intangible assets | ​ | ​ | 6,900
Goodwill (deductible for tax purposes) | ​ | ​ | 5,877
Other non-current assets | ​ | ​ | 31
Total assets acquired | ​ | ​ | 17,503
Other non-current liabilities | ​ | ​ | 25
Operating lease liability | ​ | ​ | 425
Total liabilities assumed | ​ | ​ | 450
Total fair value of net assets acquired | ​ | $ | 17,053
Summary of intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Amortization |  | ​
​ |  | ​ | ​ |  | Method |  | Useful Life
Technology | ​ | $ | 1,100 |  | Straight-line |  | 5
Customer relationships | ​ |  | 5,500 |  | Straight-line |  | 15
Tradename | ​ |  | 300 |  | Straight-line |  | 5
Total | ​ | $ | 6,900 |  |  |  |
Versatile Power, Inc[Member] |
Business Acquisition [Line Items] |
Schedule of components of fair value of total consideration transferred | ​
​ | ​ | ​ | ​
Cash paid for acquisition |  | $ | 4,654
Holdback | ​ | ​ | 950
Total fair value of consideration transferred | ​ | ​ | 5,604
Less cash acquired | ​ | ​ | (245)
Total purchase price | ​ | $ | 5,359
Schedule of fair value of assets acquired and liabilities assumed | ​
​ | ​ | ​ | ​
​ |  | Fair Value
Current assets and liabilities, net | ​ | $ | 1,021
Property and equipment | ​ | ​ | 35
Operating lease right-of-use assets | ​ | ​ | 463
Intangible assets | ​ | ​ | 4,000
Goodwill (deductible for tax purposes) | ​ | ​ | 323
Total assets acquired | ​ | ​ | 5,842
Other non-current liabilities | ​ | ​ | 20
Operating lease liability | ​ | ​ | 463
Total liabilities assumed | ​ | ​ | 483
Total fair value of net assets acquired | ​ | $ | 5,359
Summary of intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Amortization |  | ​
​ | ​ | ​ | ​ | ​ | Method | ​ | Useful Life
Technology | ​ | $ | 400 |  | Straight-line |  | 5
Customer relationships | ​ |  | 3,600 |  | Straight-line |  | 15
Total | ​ | $ | 4,000 |  |  |  |

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